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69 Threads found on edaboard.com: **Convert To Negative**

Hi,
i want to **convert** 4 to 20mA into 0-3.3 v range.
I know about RCV420. but it needs **negative** supply.
Anyone knows any ICS, which is **convert**ing the current into voltage other than RCV420?
Thanks in Advance
Akhil francis

Microcontrollers :: 02-13-2017 10:33 :: akhilfrancis :: Replies: **2** :: Views: **351**

You can have look at the basic working theory @ Its implemented for LPC2148 but the underlying working is the same. You need to generate or use a hardcoded sine lookup table which feeds values to your PWM block and at the PWM output use a filter which acts a D

Microcontrollers :: 04-06-2017 12:19 :: Power_user_EX :: Replies: **9** :: Views: **1771**

You have to **convert** the 1k || -j284 circuit to an equivalent series circuit by applying basic complex arithmetic. (**convert** impedance to admittance, add it, **convert** back to impedance).

Electromagnetic Design and Simulation :: 11-11-2016 15:52 :: FvM :: Replies: **4** :: Views: **509**

I want to **convert** the -0.5 volt to 20 volt. I thought that the transistor could be used to capture 20 volt if i supplied it with the same value.
- - - Updated - - -
Hi,
give +0.5V to the emitter of the BJT.
And use a current liitng resistor at the base (10k?)
Klaus
I want t

Analog Circuit Design :: 08-11-2016 19:43 :: mshh :: Replies: **5** :: Views: **431**

Hello,
i open the LNB and found this chip on PCB the LNB **convert** the high Freq 10Ghz to IF 1GHZ what is the use of chip and how this lnb work
znbg3211
130021

Digital communication :: 06-22-2016 05:29 :: RITESH KAKKAR :: Replies: **2** :: Views: **740**

I have a circuit set up as differential input with op-amps running of a -/+5V supply, this is so it can measure current flow in either direction it boosts the voltage from 0-60mV to 0-3.73V and the other part **convert**s the signal to a positive voltage regardless current flowing in and out.
This is working very good but I would like to a - sign when

Hobby Circuits and Small Projects Problems :: 11-20-2015 07:01 :: wizpic :: Replies: **4** :: Views: **667**

A charge pump has a DC-powered oscillator that produces an AC voltage. Then it charges a capacitor to near the peak voltage of the AC. Then on the next AC cycle it charges another capacitor and adds its voltage to the voltage of the first capacitor.
A charge pump can also **convert** a positive voltage to a **negative** voltage using its oscillator, some d

Elementary Electronic Questions :: 07-30-2015 14:26 :: Audioguru :: Replies: **7** :: Views: **973**

HI,
I have a 14-bit data that is fed from FPGA in vhdl, The NIos II processor reads the 14-bit data from FPGA and do some processing tasks, where Nios II system is programmed in C code
The 14-bit data can be positive, zero or **negative**. In Altera compiler, I can only define the data to be 8,16 or 32

PLD, SPLD, GAL, CPLD, FPGA Design :: 05-28-2015 11:57 :: wannaknow :: Replies: **4** :: Views: **981**

C5/R15 will cause malfunction of the circuit. **negative** halfwaves are clipped by the input protection diode of the ADC input.
The most simple solution is to omit the highpass, send the 2.5V centered AC signal to the ADC and process it in a suitable way. If you want to **convert** the AC current to a DC voltage in hardware, you need active rectifier c

Analog Circuit Design :: 09-05-2014 05:26 :: FvM :: Replies: **4** :: Views: **679**

Depending on power requirements, for low power, a Charge Pump and for high power a Cuk **convert**er are two approaches.

Elementary Electronic Questions :: 09-03-2014 22:33 :: SunnySkyguy :: Replies: **2** :: Views: **786**

do you have 2 problems?
1 - the value is wrong, as you say it is too small or **negative**
2 - the number notation is scientific
There are a few values which should **convert** to non-zero integers - do they **convert** ok?

PLD, SPLD, GAL, CPLD, FPGA Design :: 04-26-2014 23:41 :: kam1787 :: Replies: **1** :: Views: **497**

A 555 is triggered with a **negative**-going pulse to its pin 2. Use a transistor or logic inverter to **convert** your positive pulse to a **negative**-going pulse.

Elementary Electronic Questions :: 12-14-2013 02:21 :: Audioguru :: Replies: **5** :: Views: **827**

To **convert** a real number to signed fixed point, you multiply it with the scaling factor (2^16 in your case) and **convert** it to signed:
sfix_16_16 := to_signed(to_integer(266.7244 * 2.0**16),32)
Or use IEEE fixed point package that does the conversions for you.

PLD, SPLD, GAL, CPLD, FPGA Design :: 11-17-2013 15:58 :: FvM :: Replies: **24** :: Views: **3079**

Hi,
I want to generate **negative** voltage from the positive input of Low Drop Out Regulator.
How can I generate **negative** voltage?
My LDO output is in the range of 0.4V to 1V.
For my design, I need to **convert** the LDO's input to **negative** voltage to make sure that certain blocks are completely disabled.
I am using Cadence (...)

Analog Circuit Design :: 11-12-2013 09:56 :: shaikss :: Replies: **2** :: Views: **783**

No pins of 8051 can accept analog voltages. So you need an adc **convert**er. If it is a matter of reading the applied voltage only, then why don't you rectify the supply. This way you can rule out the **negative** half cycle... Use a rectifier & a good filter, **convert** it in dc, read through adc, multiply by 44( if step down is 220v - 5v) & divide (...)

Microcontrollers :: 08-09-2013 10:52 :: Genovator :: Replies: **2** :: Views: **442**

1) algebraically **convert** your transfer function so that all your z terms have **negative** exponents. then-->each z term represents a number of clock delays of it's input.

Digital Signal Processing :: 04-02-2013 18:36 :: barry :: Replies: **1** :: Views: **554**

yes.. my circuit requires +12v and -12v connected to it.. 200mA will be enough for my circuit..
Everyone and their dog sell these days (3W) dc-dc mini-modules that can **convert** input voltage (5V, 12V, 9-18V, etc) to output (12V) @ 250mA ...
The output is isolated so it can be added to the input voltage as **negative**

Analog Circuit Design :: 03-12-2013 02:23 :: IanP :: Replies: **5** :: Views: **847**

Do you need to **convert** 100V to -100V or do you want to generate as power supply capable of supplying both +100V and -100V?

ASIC Design Methodologies and Tools (Digital) :: 02-19-2013 06:36 :: nitishn5 :: Replies: **3** :: Views: **891**

I have a function generator that outputs a pulsed signal but it goes from -5 to +5V vpp. Any relatively simple method that can reference this from 0 to 5 V?
Reference:
I have a Marconi 2024 AM/FM SIGNAL GENERATOR

Analog Circuit Design :: 01-29-2013 22:29 :: chiques :: Replies: **5** :: Views: **530**

I'm not sure what exactly you mean?
In order to **convert** a float to integer you truncate all the decimals so what's wrong with (long int)my_float ?
If you want a round effect then use (unsigned int) (my_float+0.5) for positives.
If the float can be **negative** too my_float >= 0 ? (long int)(my_float+0.5) : (long int)(my_float-0.5)
Also in order

Microcontrollers :: 11-29-2012 10:57 :: alexan_e :: Replies: **3** :: Views: **752**

Hai dear all,
Please tell me how to **convert** pulse wave into square wave. the pulse has 0 to 5 peak i want the out put has +5 and -5 peak to peak voltage
NOTE:- Do not using -ve supply, only using pulse and +ve supply voltage. if you have any idea or circuit regarding this please sent me
Than you
Salim

Electromagnetic Design and Simulation :: 11-28-2012 15:49 :: Salim Saheb :: Replies: **5** :: Views: **3489**

Hi,
Can i get a IC or simple circuit, which can **convert** **negative** voltage to positive voltage.
my power requirement is to **convert** -10V to +5V,10mamp.
Thanks
Babesh.

Analog Circuit Design :: 09-18-2012 06:34 :: BABESH :: Replies: **1** :: Views: **1684**

Hi all,
I need measure 16 channel 0-10V or 4-20mA.
I use LTC1598 with VCC = 3V3 and Vref = 2V5
Now, i want **convert** be 0-2V.
I have two ways to do this.
You can see in the attached file
But, i don't know a better way
What are good OPAMP ?
Thanks,

Analog Circuit Design :: 08-22-2012 02:34 :: letrongdtk4 :: Replies: **6** :: Views: **1382**

Hi,
I am looking to **convert** a Pulse Train w/ both positive and **negative** pulses into a suitable form to be used by an FPGA board. I have to also keep track whether the pulse was positive or **negative**.
Any help appreciated!
Thanks
If you could provide a diagram of what you are trying to capture, we migh

PLD, SPLD, GAL, CPLD, FPGA Design :: 08-03-2012 18:38 :: willis... :: Replies: **3** :: Views: **1283**

Once you have obtained a positive binary value...
Count how many times you can subtract a power of ten. If your number is, say 3456, then subtract 1000. Each time you do, increment a counter.
When you can't subtract 1000 any more, start subtracting 100. Start the next counter, incrementing each time.
Etc.
Until you reach 0.
**convert** the store

Microcontrollers :: 07-31-2012 06:56 :: BradtheRad :: Replies: **2** :: Views: **1017**

how to **convert** signed to unsigned integer using mikroC?

Software Problems, Hints and Reviews :: 06-10-2012 05:48 :: youstron :: Replies: **1** :: Views: **735**

Hello, i have simulated the design in HFSS and now for the fabrication purpose i have to make the **negative** of my design to make the pcb so i export the design to DXF design is **convert**ed into .dxf file but now i am not able to take its print out to make the **negative**. I am not able to **convert** it into jpg file with exact (...)

RF, Microwave, Antennas and Optics :: 05-03-2012 08:46 :: vishal_sonam :: Replies: **0** :: Views: **866**

As the evolution of process, there does exit **negative** values in *.lib. Such as A->Y delay value, DFFs' D pin hold value. So, you may open some options when you use the command to **convert** *.lib the *.db. And you may need use an newer version of DC, such as after 2005.

ASIC Design Methodologies and Tools (Digital) :: 03-27-2012 01:40 :: yx.yang :: Replies: **1** :: Views: **1098**

Dear All,
I need to **convert** signed/unsigned decimals to their equivalent signed binary values in Matlab.I had used 2 functions but they work for positive integers only i.e de2bi() and there any function that help me or I had to write my own routine for conversion.
Regards,

PLD, SPLD, GAL, CPLD, FPGA Design :: 02-11-2012 11:50 :: vickyuet :: Replies: **1** :: Views: **7268**

Hi every one
I want to **convert** **negative** integer number to std_logic_vector in xilinx fpga. I want to **convert** it in 16 bit.
is it correct :
vout <= conv_std_logic_vector(-32000,16);
is it **convert**ing to std_logic_vector in 2`complement?
Regards
Arasg

PLD, SPLD, GAL, CPLD, FPGA Design :: 02-05-2012 15:00 :: arash rezaee :: Replies: **6** :: Views: **4718**

hey , i have a code that quantize a sin wave to for example 7 bits each level, and the data for each level is a **negative** fraction like (-1.25), how i can **convert** such a number (-1.25) to binary number ? thnx

EDA Jobs :: 11-12-2011 03:02 :: kimo4ever :: Replies: **0** :: Views: **630**

Hi,
What is the voltage to be **convert**ed and what current you need out of it?
Help depends on your reply.

Analog Circuit Design :: 09-02-2011 11:39 :: Raza :: Replies: **10** :: Views: **1435**

Hi All ,
Please Suggest me both Integrated and discrete solution to **convert** -15V to 15V with output power requirement of 0.5W to 1W.
Thanks & Regards !!
V V

Hobby Circuits and Small Projects Problems :: 08-23-2011 05:33 :: vikasveshan :: Replies: **7** :: Views: **8194**

Hi,
I have the following situation and am uncertain how to proceed:
* Input voltage 0V to 5V (single ended signal)
* Output voltage: differential output, 2V p-p
I have a fully differential op amp that I believe is set up correctly (Rf = 400, Rg = 1k, Vocm = 2.5V, +5V rail and ground rail).
If I input +2.5V to -2.5V I get exactly the co

Analog Circuit Design :: 05-25-2011 20:40 :: bodenste :: Replies: **2** :: Views: **1487**

hi every one
can any tell me that how can i **convert** the frequency into the voltage by using the digital gates only.

Analog Integrated Circuit (IC) Design, Layout and Fabrication :: 04-15-2011 10:02 :: faiq khalid lodhi :: Replies: **2** :: Views: **674**

For check if a transistor act at saturation mode is need to check if any nmos has Vds>Vgs-vt .For the pmos how to **convert** this equation?
For transistors which are use as current mirror, the above equation have to be satisfied?

Analog Integrated Circuit (IC) Design, Layout and Fabrication :: 01-20-2011 20:19 :: Tom2 :: Replies: **1** :: Views: **4820**

Look for the November and December 1986 issues of ETI ..
There was a description of a heavy duty switching regulator (lm3524+power mosfets) that with some modifications could be used to **convert** 12V dc to 2V dc at very high amperage ..
And the interesting thing about that design is that it is actually chopping the **negative** pole (positive earth s

Power Electronics :: 10-15-2010 02:43 :: IanP :: Replies: **4** :: Views: **745**

Hi,
chekc these links below,
**convert**ing wav files into binary form using matlab
matlab **convert**ion from .wav to binary

Digital Signal Processing :: 07-19-2010 07:01 :: hanif :: Replies: **2** :: Views: **2990**

in using 2's complement the -12 in binary is 11110100.
but if i **convert** 11110100 to decimal using calculator gives me 244.
So if i have the binary number 11110100 then how can i find that is it -12 or 244?

Microcontrollers :: 06-27-2010 15:47 :: engr.waqas :: Replies: **8** :: Views: **1113**

For example, "101" is a **negative** binary variable. How to **convert** it into decimal in matlab?

Digital Signal Processing :: 01-05-2010 21:09 :: neoflash :: Replies: **3** :: Views: **11154**

One way is to **convert** it to the floating point notation. Then you´ll have a mantissa (signed or not) and an exponent. **convert** the mantissas to positive numbers and keep tracking of the signals. Then you can multiply the mantissas and work on the exponents to get your result. Finally, calculate the final sign. Your results will be in the floating p

PLD, SPLD, GAL, CPLD, FPGA Design :: 09-28-2009 18:34 :: pauloynski :: Replies: **2** :: Views: **1130**

i dont think for any direct method . first you can **convert** it to pdf and change to **negative** mode with some editing software.

PCB Routing Schematic Layout software and Simulation :: 08-15-2009 18:01 :: rajudp :: Replies: **3** :: Views: **9954**

Dear All,
The normal regulator only **convert**s the positive voltage and their substrate is ground.
Now I want to design a regulator, whose **negative** input voltage may exceed its **negative** substrate voltage.
For example, its input voltage is from -10V to +10V, I would like to **convert** it to constant voltage -5V to +5V. But (...)

Analog Integrated Circuit (IC) Design, Layout and Fabrication :: 06-08-2009 17:09 :: katrin :: Replies: **4** :: Views: **2030**

Hi, everyone.
I am wondering whether you guys have any recommendations for **negative** DC power, **convert** -5V to -3V? Thanks.

Analog Circuit Design :: 06-01-2009 22:53 :: winglj :: Replies: **2** :: Views: **904**

Hi...
Can any body help me on design the **convert**er from **negative**(-48v) voltage to positive(48v) voltage.
TQ

Elementary Electronic Questions :: 01-13-2009 09:03 :: shahrol_hisham :: Replies: **7** :: Views: **4938**

Yes, its possible.
But this would lower down the 8-bit resolution. You leave ref/2 pin open, don't connect it. If I remember that PIN number correctly, in this you get range from 0-5V.You first takes the absolute value of -5V to +5V, so altogether difference of 10V, means if you give **negative** voltage, it must be get **convert** into positive value, if

Microcontrollers :: 12-26-2008 21:09 :: umery2k75 :: Replies: **5** :: Views: **3137**

we have our design and we are using sound wave files and we want to **convert** this files into a binary and we will using matlab. .for this,what is the matlab code of a **negative** value such as -0.0425?. .
thank you!!. . .

Digital Signal Processing :: 12-24-2008 22:43 :: racky :: Replies: **0** :: Views: **1289**

I have a delta sigma adc (cs5532). I'm trying to **convert** the small signals i.e mVs into digital. It has a 5V supply and a 2.5V ref voltage which is at 2.490 or 2.495V and maintained by a low ppm low noise ref voltage ic. The ADc is in unipolar mode. So the **negative** values should be measured as zero and that is the case mostly. I'm getting some meas

Professional Hardware and Electronics Design :: 12-22-2008 16:27 :: seyyah :: Replies: **1** :: Views: **2160**

Theorotical:
**convert** S parameter in to Z parameters.
Add XL that is inductance to Z parameters
Again **convert** to S parameters.
If your S11 is >1 means you have obtained **negative** resistance.
You find the details about the explanations in following books
You can tally this using S11 equation. (zin-zo/zin+zo)
1) Microwave transistor (...)

RF, Microwave, Antennas and Optics :: 08-20-2008 08:36 :: Abhishekabs :: Replies: **3** :: Views: **1772**

Hi
Is dij a float value.**convert** to bit vector.
A is signed 16 bit data so MSB represents sign value one for **negative** zero for positive.
check for conditions based on this.
2^i is simple shift opeartion- left shift by i times.
I hope this helps and further discussion welcome...
regards,
Vinod

PLD, SPLD, GAL, CPLD, FPGA Design :: 08-11-2008 12:28 :: vinodkumar :: Replies: **3** :: Views: **1109**

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