Integrated circuit configuration and method for monitoring a co-

Details Integrated circuit configuration and method for monitoring a co- Integrated circuit configuration and method for monitoring a co-

1988-04-13

1989-03-28

LaRoche, Eugene R.

Oscillators

Plural oscillators

Selectively connected to common output or oscillator...

331 44, 331 64, 371 8, 371 61, H03B 100

Patent

active

048167762

ABSTRACT:
An integrated circuit configuration and a method monitor an integrated oscillator in the circuit. The oscillator has a minimum frequency and furnishes a synchronously controlling clock rate for the functioning of the integrated circuit when excited by an external frequency standard. An integrated reserve oscillator has a maximum frequency below the minimum frequency of the oscillator. An integrated frequency comparator is connected to the reserve oscillator and to the oscillator for comparing the frequency of the reserve oscillator with the frequency of the oscillator.

REFERENCES:
patent: 3289097 (1966-11-01), Martin
patent: 3708686 (1973-01-01), Butler, Jr. et al.
patent: 4667328 (1987-05-01), Imran
Bell System Technical Journal, vol. 62, No. 10, Teil 3, Dec. 1983, pp. 3377-3390.
J. M. Kiker, Jr. et al.: "The ARGA Single-Sideband Microwave Radio System: Frequency Control", Pa. 3378, line 24-Pa. 3380, line 10; Pa. 3384, line 17-Pa. 3388, line 38; FIGS. 2,4,6.

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