This 1967 Motorola circuit is intended for operation with signals up to 250 MHz delivering a 50 MHz signal at the output. The transistor is the MM1941, uncommon today.
This circuit consists of a traditional version amplifier with complementary output transistors...
The tones of this circuit are determined by the feedback resistors on the oscillators with the...
The circuit shown is from the National Semiconductor FET manual. Field effect transistors and...