Signal generator having backup oscillator switching circuit

Details Signal generator having backup oscillator switching circuit Signal generator having backup oscillator switching circuit

1992-06-03

1993-08-10

Grimm, Siegfried H.

Oscillators

Plural oscillators

Selectively connected to common output or oscillator...

307219, 328 61, 328104, 331 18, H03B 100, H03K 300, H03L 706

Patent

active

052352927

ABSTRACT:
A signal generator having a switching function includes a first oscillation circuit, a second oscillation circuit, a frequency-division circuit and a combination circuit. The first oscillation circuit outputs a first frequency signal having a first frequency and a reset signal synchronized with the first frequency signal. The second oscillation circuit outputs a second frequency signal having a second frequency which is N times higher than the first frequency. The frequency-division circuit frequency-divides the second frequency signal by N, resets a value for frequency-division based on the reset signal and generates a divided second frequency signal. The combination circuit combines the first frequency signal and the divided second frequency signal and outputs a combined signal.

REFERENCES:
patent: 3803568 (1974-04-01), Higashide
patent: 4949052 (1990-08-01), Chigira

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