Title:
OSCILLATOR AND METHOD OF MANUFACTURING SAME
Document Type and Number:
Japanese Patent JPS56104504
Kind Code:
A
Abstract:
An oscillator circuit having a digital temperature compensation circuit which contains two low frequency quartz oscillators, a beat frequency generator and a correction circuit and a logic circuit selectively controlling an addition circuit. The beat frequency generator receives the frequencies generated by the low frequency oscillators. The difference between the low frequencies is fed into the correction circuit which in turn cooperates with the logic circuit. The beat frequency generator is controlled by a high frequency oscillator having an integrated RC circuit and the correction circuit has a PROM in which the correction functions are stored. The selectively controlled addition circuit acts on the output signal of the first oscillator and corrects the frequency thereof. An oscillator circuit connected in such a manner requires no pre-selection of the quartz crystals in pairs and the correction may be effected by influencing the high frequency oscillator, whereby a high degree of accuracy may be obtained.
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Inventors:
ARUFUONSU ZUMUSUTETSUGU
Application Number:
JP200481A
Publication Date:
August 20, 1981
Filing Date:
January 09, 1981
Export Citation:
Assignee:
SUISSE HORLOGERIE
International Classes:
H03B5/32; G04F5/06; G04G3/02; H03L1/02; (IPC1-7): H03B5/04; H03L1/02
Domestic Patent References:
| JPS5325341A | 1978-03-09 | |||
| JPS5479672A | 1979-06-25 | |||
| JPS5485766A | 1979-07-07 | |||
| JPS54118871A | 1979-09-14 | |||
| JPS5476261A | 1979-06-18 |