This circuit for UHF between 800 and 1 000 MHz was found in an American documentation from the 90's. The integrated circuit is from that time, uncommon today.
Two operational are used on this triangular-rectangular oscillator suggested by Motorola in its...
Found in Linear Technology documentation from the 90s, this circuit uses an operational amplifier...
This simple two-transistor circuit used transistors from the 60s, having been found in a...