High-Q multi-mode resonator controlled source

Details High-Q multi-mode resonator controlled source High-Q multi-mode resonator controlled source

1978-08-09

1981-01-13

Grimm, Siegfried H.

Oscillators

Beat frequency

Plural beating

331 41, 331107A, H03B 304, H03B 530, H03B 2102

Patent

active

042451930

ABSTRACT:
An oscillation control circuit in which the output of an unstabilized oscillator is controlled using a bulk acoustic wave resonator. The circuit includes a high and low frequency loop with the power output of the oscillator being divided and supplied along respective paths to the high and low frequency portions of the loop. The high frequency portion of the loop, which includes the BAW resonator, operates at the output frequency f.sub.0, which is equal to the sum of the oscillator frequency f.sub.1 and the frequency f.sub.2 of the low frequency portion of the loop. A first mixer receives the frequencies f.sub.0 and f.sub.1 and produces an output f.sub.2 in the low frequency portion of the loop, while a second mixer receives the frequencies f.sub.1 and f.sub.2 and produces an output f.sub.0 in the high frequency portion of the loop. In this way, as the oscillator output frequency f.sub.1 varies, the frequency f.sub.2 in the low portion of the frequency loop varies inversely, so that the up-down conversion performed by the system maintains f.sub.0 constant.

REFERENCES:
patent: 3855548 (1974-12-01), Nandi et al.

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