tape player amplifier (CB7301E)

Found in a 1968 Electronics World, this circuit uses operational amplifiers from that time.

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T Bridge Audio Oscillator (CB4689E)
This circuit is from an ancient American documentation. The T-Bridge circuit determines the...
Auto Bias for FET (CB6125E)
This configuration is from a 1964 US documentation valid for any FET. The range of power voltages...
Differential instrumentation amplifier (CB9841E)
This instrumentation amplifier with differential inputs was found in documentation from the 90s....