Posted on Jun 5, 2012

The circuit consists of separate amplifiers—one for each station—rather than a single amplifier and a time sharing arrangement. Ul and U2 are low-voltage audio amplifiers, each of which operates as separate entities with switches at either station controlling which will transmit or receive. With capacitors C7 and C8 included in the circuit, the amplifiers have a gain of 200. Omitting those two components drops the gain to about 20.

Click here to download the full size of the above Circuit.

Other gain levels are available with the addition of a series-connected R/C combination connected between pin 1 and pin 8—for example, a 1000 ohm resistor and 10 µ¥ capacitor for a gain of about 150.

Leave Comment

characters left:

New Circuits



Popular Circuits

Ni-cad charger with current and voltage limiting
EFHW Tuner
led discharge circuit
dc motor control circuit
12 V Florescent lamp driver circuit
Resurrecting Tennis for Two a video game from 1958
dvi to par digital video interface with lcd
PIC Projects
Sampling RF Power
Video Switch Circuit Schematic Diagram
Intermittent start and stop cycle control circuit of the four
Multi-unit slip motor speed control system synchronous operation circuit