Low noise HF transistor oscillator - has transistor emitter-base junction shorted over noise frequency band of oscillating stage

摘要

The low-noise HF transistor oscillator has the emitter/base junction of its oscillating transistor (Tr) short circuited by an appropriate impedance (L1, C1, C2, L2) overthe frequency band in which the noise component of the oscillating stage lies. The quartz crystal (K) is shunted by a capacitive voltage divider (C11, C12). An inductor (L1) in series with a capacitor (C1) shunts the crystal and divider and forms an audio frequency short circuit.