The circuit shown is from Texas Instruments optoelectronics documentation. The input signal is audio and equivalent LEDs can be used. Other operational amplifiers can also be used.
This circuit was found in a 1967 General Electric documentation. The components are from that...
This configuration applies to common operational amplifiers. This circuit is from the datasheet of the...
Found in Harris' 90s documentation, this circuit has a gain of 60 dB at 20 MHz. Equivalent...