Microphone Limiter (CB21761E)

This limiting circuit for crystal microphones was found in documentation from 1977. Transistors are general-purpose types at the time.

5 W Amplifier (CB16569E)
This traditional amplifier with complementary output transistors was found in a publication in...
1 to 4 MHz CMOS Oscillator (CB9658E)
This traditional crystal oscillator configuration can use any CMOS gate configured as an inverter. R1...
15 V Regulator MA1539 (CB4017E)
This circuit is from a documentation on the MC1539 from Motorola and may, however, be implemented...