36 Threads found on edaboard.com: tl072
Most important assumptions for that project was to eliminate sound noises, and noises from cell phone. I had un useful ( because of low quality) PC speakers, and I decided to rebuilt them. I choose tl072 it was good choice for preamplifier. Amplifier played well but I wanted more power , that’s why I put 2xTL084 from broken cd rom. I used apl
Show DIY :: 04-02-2010 16:36 :: gres :: Replies: 1 :: Views: 2828
I am quiet new and I want to design amplifier for my project. I have sinusoidal signal with amplitude of 2.4V(P-P) and i want to amplify it to 12V(P-P). Power supply I used is +12 and -12 volt for tl072 Ic. How can I amplify it and does the power supply has effect on the output voltage.
Please help me.
Analog Circuit Design :: 05-13-2012 04:29 :: arash rezaee :: Replies: 7 :: Views: 1089
Check NE5532/4, tl072 App. Notes.
Professional Hardware and Electronics Design :: 06-30-2002 17:49 :: DavidP :: Replies: 6 :: Views: 1403
I've built a small preamplifier from tl072 using
the schematic from this page:
put it between the mp3 player and the car head unit, i set it
to 4x amplification with the resistors but i didn't hear anything,
except the no
Hobby Circuits and Small Projects Problems :: 05-10-2004 04:45 :: Zedman :: Replies: 5 :: Views: 2330
As far as I remember the MC33182 is like the TL082 from TI
but with a bit less noise.
The MC33172 series can be foud at hxxp:\
and it is compatible with tl072 series.
I don't know your requirements and where it is used in your application
but the TL082 are standard components. Further more the GBDSO does not sound like a high
Professional Hardware and Electronics Design :: 07-01-2005 08:26 :: Aoxomox :: Replies: 6 :: Views: 3033
Do you have PCB from Rod Elliot or you have done it yourself? I have build 3 of this Preamp + Amp on my boards and they work all OK. What OP Amp do you use? If you use the OPA2134 you must put 10uF + 100nF from each power pins to ground nearest possible to op-amp and also 10uF + 100nF between + and - power pin directly on op-amp. I preferd the TL07
Analog Circuit Design :: 05-29-2006 04:05 :: dipsi111 :: Replies: 2 :: Views: 970
From what I can find the spectrum analyzer module is the (A11) module
I have some rough notes that the sweep in is on U17(MC34072) may be same as tl072 which is also the LPF on the block diagram. You should see a sawtooth sweep signal on this opamp in/out.
Sweep out is on U10(MC34072) Here you should see a variable amplitude sawtooth as you v
RF, Microwave, Antennas and Optics :: 02-03-2008 15:47 :: E-design :: Replies: 6 :: Views: 1532
For distortion pedal, you can use a generic dual op-amp like lm358, 1458 or tl082.
If you want low noise, use a tl072.
Generally, a guitard pedal is powered with a 9v battery and a rail to rail op-amp is a good choice.
Hobby Circuits and Small Projects Problems :: 06-19-2008 09:18 :: casper :: Replies: 1 :: Views: 2542
The output of a tl072 cannot go to -15V when it has a + and - 15V supply. Its max voltage is + and - 13.8V.
Hobby Circuits and Small Projects Problems :: 12-09-2008 15:54 :: Audioguru :: Replies: 4 :: Views: 1341
Very easy to do with a dual op amp like the LM353 or tl072. Input to first amp connected as a unity gain inverter. Output will be -V. Same input connected to the second amp configured as unity gain, non-inverting buffer. Its outpuit will be +V. Input impedance can be selected by the value of the input resistor to the first op amp. [color=blac
Analog Circuit Design :: 12-26-2008 18:16 :: 2pmq :: Replies: 5 :: Views: 879
With a single polarity supply, the resistor that connects to the virtual ground must be at a low impedance to 0V. The virtual ground must be decoupled with a pretty big capacitor to ground. The source and input capacitor must be low impedances. Then it might work properly as a bandpass filter.
The negative swings of the opamp should not be clipp
Analog Circuit Design :: 07-04-2009 13:12 :: Audioguru :: Replies: 16 :: Views: 2362
The LM3886 is a good choice for a poweramp but it is my opinion that your prblem is in the loudspeakers or you need some equalization. No op-amp will give an audible better output for your bandpass filter.
Added after 3 minutes:
The tl072 gives you, by far, much more than you can hear.
Hobby Circuits and Small Projects Problems :: 10-11-2009 23:20 :: pauloynski :: Replies: 26 :: Views: 8270
Stereo amplifier with good bass but with possibility to quite good play in rest of range.
I decided to use double bridge TDA7294. Power amps is dual-mono construction, close in one casing.
System start with two soft
Show DIY :: 02-18-2010 02:30 :: gres :: Replies: 0 :: Views: 1836
The tl072 opamp will not work properly with a 5V supply. You should use a rail to rail opamp instead. You are wasting many I/O pins driving transistors. You can use one port to load a register (five in your case) and a few logic pins to controll (chip select them). This will give some additional I/O pins. Also (as posted above) using a resistive di
Microcontrollers :: 12-13-2010 11:36 :: pauloynski :: Replies: 18 :: Views: 1974
The second IC is an inverting opamp with a gain of about 100,000 because it is missing an input resistor. So of course it is noisy. It is also shorting the output of the first opamp.
Why would anybody use a lousy old LM358 for a mic preamp instead of using a low noise audio dual opamp like a tl072?
Analog Circuit Design :: 04-20-2011 12:54 :: Audioguru :: Replies: 16 :: Views: 5032
My teacher require me use op-amp
audio is located from ~ 200Hz to 14oooHz (if you need to calculate band pass filter
for five band with op-amp you can use LF356 (MOSFET input) or tl072 and one for bass (TL071) with band pass filter between 200 -400Hz
hope this help you..
Hobby Circuits and Small Projects Problems :: 05-03-2011 12:01 :: yo2ldk :: Replies: 16 :: Views: 2909
Sorry, BUt How can I change the default values for th voltages of a Chip?
For instance I am using a tl072 OP-AMP in Proteus but The default voltage for it seem to be 5V even when I connect the higher voltages to pins #8 and 4 of the said chip.
Or for some other chips There in no voltage pin connected to the chip so that I could c
PCB Routing Schematic Layout software and Simulation :: 08-25-2011 16:39 :: epilot :: Replies: 1 :: Views: 2121
The measured power of the tip: 2x350W with 8 ohms resistance
Transformers: 1.5kW with 2x60VAC
Main filtration: 12x6800uF on 100V
Tips: 5 pairs of irfp240/9240
Cooling: tunneling on each channel
Show DIY :: 09-04-2011 14:16 :: Vermes :: Replies: 0 :: Views: 645
You can use AD620 (it is an instrumentation opamp) or tl072 or tl074 as well as.
Analog Circuit Design :: 09-30-2011 02:21 :: goldsmith :: Replies: 2 :: Views: 342
The overall concept
An amplifier of small size and power of 50-100W was the aim of this project. Well known system LM3886 was used for this purpose because it is cheap and simple to make. Another reason why LM3886 was ch
Show DIY :: 10-26-2011 15:00 :: Vermes :: Replies: 0 :: Views: 645
I have technical help how calculated OP Amplifier Resistors R1, R3, R4 & R5 for following known value:
R2 = PT1000
R2min = 822 Ohm (-20C)
R2max = 1758 Ohm (+200C).
Vcc= +10 V for LTC271CP
R1 = ????
R3 = ????
R4 = ????
R5 = ????
Vout = 0 - 5V (Vout = ADC ATMEGA16 or 10,14,16-bit external ADC on yours suggestion.)
Analog Circuit Design :: 12-10-2011 11:13 :: ilacmano :: Replies: 1 :: Views: 1197
Both transmitter and receiver can operate from the same or separate power supplies. When you separate both units, as their RF circuits are farther from each other, they must be tuned to the same frequency and possibly use a short (quarter-wave) antenna each, to properly transmit at 434 MHz.
For adjustments I would suggest to use an audio amplifier
RF, Microwave, Antennas and Optics :: 02-14-2012 13:09 :: jiripolivka :: Replies: 4 :: Views: 1484
Thank youfor the thread, Keith. What frequency of approximate sinewave does this circuit generate? What amplifier do I need? Thanks.
The values shown give 15kHz. The opamp used there is the tl072 but others could be used.
Hobby Circuits and Small Projects Problems :: 03-15-2012 05:58 :: keith1200rs :: Replies: 25 :: Views: 6252
of that satellite receiver for receiving weather maps from NOAA satellites was inspired by a project described here: LINK .
The only change was that the PCB was designed and few elements were replaced with other (tl072, filt
Show DIY :: 06-05-2012 03:38 :: Vermes :: Replies: 0 :: Views: 1190
Hi every one.
How can I convert balanced audio signal to unbalanced signal with simple op-amp like tl072? I search a lot and I tested 2 circuit samples but non of them was acceptable. the balanced input is for example 12volt(P-P) but at the output I have 20volt(p-p). Please let me know if you have a good solution for converting balanced to unbalan
Analog Circuit Design :: 08-12-2012 11:00 :: arash rezaee :: Replies: 5 :: Views: 1611
I think tl072 is only intended to be used with symmetric power supply
Analog Circuit Design :: 10-21-2012 09:13 :: alexan_e :: Replies: 11 :: Views: 373
When probing pin 1 of the tl072 I can only hear a high pitched noise, I think the problem is coming from there.
These may be parasitic oscillations. It is a typical problem when operating an op amp at high gain.
There are a number of things to try in order to eliminate them. Connecting a resistor or capacitor at various points ar
Analog Circuit Design :: 12-15-2012 17:37 :: BradtheRad :: Replies: 1 :: Views: 234
I could imagine that this question is hard to answer "correct", since there are as many tastes as possibilities...
I just finished renovating a rather nice Semi-Pro mixing-desk at home (A&H GS3).
It has a nice 3-band EQ (MF+LF are sweeping).
I replaced all the original EQ-ICs to newer ones.
It had the typical tl072 Op-Amp, and
Analog IC Design and Layout :: 01-17-2013 21:05 :: R4Dt :: Replies: 3 :: Views: 353
The threshold voltage of a Mosfet is when it is almost turned off (0.25mA), not when it is turned on.
When BJTs are used as emitter-followers at the output then they have no voltage gain so the circuit is stable.
You show a TL082. Why not use an tl072 dual audio opamp instead that is a TL082 selected for low noise? It costs the same.
Analog Circuit Design :: 02-20-2013 09:42 :: Audioguru :: Replies: 37 :: Views: 1456
LM358 is quite noisy, but if the microphone provides enough signal (>10 mV) it might be adequate. TL071 / tl072 are much better opamps, but need a higher voltage supply, like 12 V and the output should be capacitively coupled to the ADC pin, and the pin biased to VCC/2 with resistors.
The problem with the schematic you posted is the low input i
Analog Circuit Design :: 03-31-2013 17:21 :: Eugen_E :: Replies: 11 :: Views: 1735
An LM2904 is very old with poor specs so it is CHEAP. But is has a much wider temperature range than the LM358 which is the same dual opamp for a narrow temperature range (and is even cheaper).
A tl072 is an inexpensive low noise wide bandwidth audio dual opamp that I use frequently. It is available as a single opamp (TL071) and as a quad (TL074).
Analog Circuit Design :: 08-08-2013 07:37 :: Audioguru :: Replies: 9 :: Views: 555
If 330E is 330 ohms then an opamp cannot drive it because this very low value resistor will draw too much current from the output of the opamp.
The tl072 will not work if the DC input voltage to R5 is less than about +4V because the opamp does not have a negative supply at pin 4.
So I guess voltage followers will n
Electronic Elementary Questions :: 02-13-2014 12:25 :: barry :: Replies: 8 :: Views: 274
The overheating could be caused by instability leading to ultrasonic oscillation. Have you checked the output of IC13 with a scope while it's misbehaving?
tl072 won't overhead with high frequency large signal as long as it's not loaded with a large capacitance.
The full schematic reveals a serious circuit problem, IC13B output is
Analog Circuit Design :: 07-24-2014 15:51 :: FvM :: Replies: 6 :: Views: 267
The tl072 opamps and nearly all other opamps already have an internal frequency compensation capacitor that allows 100% negative feedback (gain of 1) without oscillation. Then their gain drops as frequencies get higher.
The opamp in the IR3447 needs to operate at a high frequency with plenty of voltage gain so it uses a resistor in series with an e
Power Electronics :: 08-05-2014 12:53 :: Audioguru :: Replies: 6 :: Views: 258
Use this circuit that works.
I agree that the tl072 has a problem (Opamp Phase Inversion) when the input signal level gets too high.
Analog Circuit Design :: 08-25-2014 11:36 :: Audioguru :: Replies: 8 :: Views: 405
The LM324 quad and LM358 dual opamp's are low power which causes them to be slow. They have trouble with high level sinewaves above about 2kHz so a triangle wave above about 200Hz will be fairly messed up.
Any half-decent audio opamp like the TL071 single, tl072 dual and TL074 quad work well up to 100kHz so they can produce a good triangle wave up
Analog Circuit Design :: 10-02-2014 11:34 :: Audioguru :: Replies: 10 :: Views: 635