2010年12月6日 · The datasheets for the LM324 quad opamp and LM358 dual opamp show a VCO circuit that goes from a very low frequency growl to a fairly high audio pitch. An MC34074 quad opamp (or MC34072 dual opamp) can be used instead in …

2006年3月25日 · The LM324 produces an annoying buzzing 0.3% crossover distortion when it has NO gain, when all its gain is used as negative feedback to try to reduce its crossover distortion. The distortion is much worse when it has some gain.

2009年2月10日 · The LM324 and LM358 have outputs that work at the negative supply voltage but do not work if they are higher than 1.5V less than the positive supply voltage. Some opamps have inputs that work at the positive supply voltage but the opamp goes crazy if an input goes lower than 4V above the negative supply voltage.

2011年8月29日 · Did you also download the LM324.mod file on that yahoo link, I just downloaded the unis and .mod and it works ok without any other actions. Make sure the LM324.mod is in the same folder as the LM324_unis.asc. Lets know EDIT: If you have used the LTS install default folder, place the *.mod file into this folder C:\Program Files\LTC\LTspiceIV\lib\sub

2009年3月16日 · I once had a diagram to built a Voltage Control Oscillator out of a LM324. I dont found it anywhere. I try to google without luck. Anyone got a LM324 VCO circuit and shared it ? Thanks. I will like to built a small synth (music instrument) using such oscillator.

2011年5月22日 · Any opamp will work but the LM324 quad or the LM358 dual are nice because they work when the supply is only 3.0V. The circuit is missing parts that control the output amplitude so it will be too much and cause clipping distortion. The LM324 and LM358 are noisy (hiss) and have crossover distortion.

2010年5月25日 · The LF347 has at least twice the bandwidth of the LM324, requires 1000 times less input bias current (higher input impedance), slew rate 10 to 20 times faster, among other things. Despite it's advantages over the LM324, the LF347 does have some serious drawbacks that limit it in applications that have rather low supply voltages.

2009年7月7日 · A load resistor would be connected from the output pin of the LM324 to either ground or +10V. I seem to remember (audiguru will chime in on this) that an LM324 is a particularly crummy opamp for audio because it has a lot …

2025年3月10日 · A pcb made according to the schematic (attached below) uses LM324 opamps. With no input signal to the current transformer pin 3 should be low, and pin 2 follows feedback from output pin 1 (high). Two of the opamps give 0.0V on their pin 1, but two opamps measure approx. 2.5V on their outputs...

2010年11月7日 · I placed the two of them in the same breadboard. The input (+) connected on the LM324 was an IR receiver module. I used a transistor symbol because I can't find one IR module on ISIS. Collector as 5v, base as Gnd and Emitter as output. The problem is the IR receiver receives a signal eventhough my IR LED is not present on the 2nd 555 timer circuit.