This circuit was found in Texas Instruments documentation from 1968. The transistors are from that time, admitting modern equivalents. The response ranges is from 20 to 20 000 Hz.
This amplifier for sound equipment was found in the Philips Databook of 1990. The circuit can be...
I found this circuit in an English publication from 1989. This configuration can be mounted with...
The circuit shown is from a 1978 Texas Instruments optoelectronics manual. The circuit can use...