450/800Hz signal generator

Published:2011/4/20 7:01:00 Author:Ecco | Keyword: 450Hz , 800 Hz , signal generator | From:SeekIC

450/800Hz oscillator circuit shown as the chart is a transformer coupled oscillator. The changing of frequency is realized by changing the Tl tap of oscillation tank to achieve different inductance. Pulling the signal control switch S to the 1 block, the oscillation circuit C4 and l-2 end of Tl-side connects in parallel, the frequency is 800Hz, and it is output by VT2 emitter to the adjustable arm of RP potentiometer. Adjusting the potentiometer will change the size of 800Hz output. R4 in oscillation circuit is used to adjust the oscillation amplitude. Pulling the S to the 2 block, C and 1-3 phase of T1 connects, the oscillation frequency is 450Hz. Adjusting T1 threaded lever can fine-tune the oscillation frequency of the oscillator.



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