Tag - Oscillator

Variable Frequency Oscillator Gain Limiting

Variable Frequency Oscillator Gain Limiting The VFO is one of the main subsystems in a transceiver. It sets the operating frequency for both reception and transmission. In order to “tune” to other frequencies, we actually change the frequency of this variable frequency oscillator. Two general [...]

Oscillators Clapp Oscillator VFO Startup

Oscillators Clapp Oscillator VFO Startup Oscillators are circuits that produce periodic output voltages, such as sinusoids. They accomplish this feat without any “input” signal, other than dc power. Our NorCal 40A has three: 1. VFO (an LC oscillator), 2. BFO (a crystal oscillator), 3. Transmitter oscillator (also a [...]