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## Filter Constant |

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137 Threads found on edaboard.com: **Filter Constant**

I need to design a complex coefficient **filter** to **filter** the complex value of each subband after **filter** bank.
Can you recommend me any books on that?
Thank you very much.

Digital Signal Processing :: 08-22-2008 16:53 :: yan105 :: Replies: **5** :: Views: **1132**

A positive peak detector circuit.
A simple rectifier and a small **filter** capacitor.

Analog Circuit Design :: 07-23-2008 01:51 :: Audioguru :: Replies: **6** :: Views: **1411**

hi all,
I would like to design a new card with
Timing **filter** Amplier,**constant** Fraction. Discriminator
FPGA, ADC 100Mhz or more
if somebody has an idea...
Thank's in advance
best regards

PLD, SPLD, GAL, CPLD, FPGA Design :: 07-02-2008 12:58 :: voho :: Replies: **1** :: Views: **1017**

hi all,
I would like to design a new card with
Timing **filter** Amplier, **constant** Fraction. Discriminator
FPGA, ADC 100Mhz or more
if somebody has an idea...
Thank's in advance
best regards

Analog Circuit Design :: 07-03-2008 14:44 :: voho :: Replies: **0** :: Views: **700**

Hello I am new here and I hope to get help for my assignment:
Question ? Design a Chebyshev three-resonator, capacitor top-coupled, **constant**-k bandpass **filter** centered at 1MHz, with 1 dB ripple and a 100kHz, 3 dB bandwidth. The source and load resistors are 1.5kΩ and available inductors have a quality factor of 60.
We just

RF, Microwave, Antennas and Optics :: 04-10-2008 03:34 :: jecyhale :: Replies: **5** :: Views: **3045**

Generally, when channel spacing is **constant** then LO step can be equal to that spacing.
Receiver bandwidth is determined by IF passband. Mixer output is wider than IF **filter** and can be determined with input **filter** or can be wideband without this **filter**.
Depending on type of modulation a fine tuning is sometimes needed. So (...)

RF, Microwave, Antennas and Optics :: 01-20-2008 23:37 :: Borber :: Replies: **7** :: Views: **1025**

what is the spectral density of AWGN passed the Square root raised cosine **filter**?

Elementary Electronic Questions :: 01-14-2008 19:51 :: BMWE :: Replies: **3** :: Views: **1899**

avdrummerboy,
The time required to bleed off the capacitor charge depends on the RC time **constant**. T = RC, Where C is the **filter** capacitance, R is the resistance, T is the time **constant** which is the time required for the capacitor voltage to be reduced to approx 37% of its fully charged value. The resistor required to discharge the (...)

Elementary Electronic Questions :: 01-12-2008 17:16 :: Kral :: Replies: **9** :: Views: **1743**

A simple RC **filter** will do this, remember if you place a zero at 0 Hz and a pole at 1 Hz you have infinite decades of distance between the two (logarithmic scale) and a single pole **filter** will slope at 20 db per decade.
To have a pole at 1 Hz is not unheard of for a simple RC **filter**:
w = 1/rc = 2*pi*f
For example c = 10uF and r = (...)

Elementary Electronic Questions :: 11-21-2007 04:31 :: jonw0224 :: Replies: **5** :: Views: **2201**

Hi
I have a problem with Hilbert FIR **filter**. when I simulate it in MATLAB, it has linear phase except of **constant** phase. I have tested lot of coefficients untill now, but all of them have linear phase.
If it is possible, please solve my problem or send me the coefficients.
Regards

Digital Signal Processing :: 09-08-2007 14:06 :: m_llaa :: Replies: **0** :: Views: **1846**

You can generate this by mixing 2 signal sources, for example a **constant** 1GHz source and a VCO that covers 1.05GHz - 1.31GHz. Use a good **filter** at the output.
If spectral purity is not a concern, there are ring VCOs that can cover this domain.
For VCO, look at MiniCircuits website.

RF, Microwave, Antennas and Optics :: 09-06-2007 18:28 :: Eugen_E :: Replies: **2** :: Views: **905**

bals,
A linear phase **filter** is a **filter** for which the phase shift is a linear function of frequency. For example, if the phase shift is X degrees at frequency F, then the phase shift will be nX degrees at a frequency of nF. It is possible to achieve exact linear phase with a FIR **filter**. However, not all FIR **filter**s have (...)

Digital Signal Processing :: 08-16-2007 03:25 :: Kral :: Replies: **8** :: Views: **1796**

guess you can talk about 2 types of delay. In analog sense, delay for an analog **filter** is defined in the way already nicely explained by RFCMOS. I think it means that if you were it give a frequency sweep to an **constant** delay **filter** (frequency being always within the **constant** group delay range of the (...)

Digital Signal Processing :: 08-01-2007 13:17 :: bulx :: Replies: **9** :: Views: **1945**

hi everyone
I need to design a voltage tunable **filter**,which has gain,because it contain an amplifier.Its center frequency is from 70MHz to 300MHz.But I have no ideal how to design it.Please give me some informations or books,and which simulation software I can shoose to design?Thanks!!!
best regards
Kezman

Analog Circuit Design :: 06-07-2007 16:22 :: Kezman :: Replies: **2** :: Views: **1913**

GM/C defines the **filter** design poles. But having **constant** GM/C instead of **constant** GM would be a better choice.

Analog Circuit Design :: 05-10-2007 15:22 :: rfsystem :: Replies: **1** :: Views: **1219**

Hi
**filter** coefficients are related to cutoff frequency. If it is not **constant**, simulate it and select one.

Digital Signal Processing :: 04-22-2007 06:27 :: m_llaa :: Replies: **2** :: Views: **1851**

Here are few "pet" questions / topics
1. Two stage Op-Amp design
2. Frequency Analysis of single stage amplifiers
3. Design of cascode amplifiers
4. Simple Lowpass high-pass **filter** cutoff frequency and
time **constant**.
5. Single MOS circuit question ..like dynamic memory etc..

Analog Integrated Circuit (IC) Design, Layout and Fabrication :: 01-29-2007 09:01 :: raduga_in :: Replies: **3** :: Views: **2938**

I got this value from Ramakanta A. gayak ward book is written that in a low pass first order butter worth **filter** Af=1.586 so Rf=0.586R1. where Rf is the feedback resistor. it is always **constant**. can u plz help me why this value is always **constant**???

Analog Circuit Design :: 01-27-2007 20:16 :: srutisahoo :: Replies: **0** :: Views: **1861**

Maybe i think, when a PLL is locked, the tension from **filter** to VCO is very stable. For example, with a fourth order **filter**, we have a variation near nV for ns.

Analog Circuit Design :: 11-14-2006 13:19 :: benj29 :: Replies: **6** :: Views: **1114**

You are sampling the output voltage of the DC-DC converter with a resistive divider?
How much capacitance do you have at the input of your amplifier ?
This will form a low-pass **filter**. Your error amplifier will also function as a low-pass **filter** with gain. Are the two time **constant**s similar ?
if not, take the dominant time (...)

Analog Integrated Circuit (IC) Design, Layout and Fabrication :: 08-23-2006 12:15 :: k1ngf1sh :: Replies: **4** :: Views: **2744**

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