Horology: time measuring systems or devices – Chronological – With pulse transforming means
Patent
1980-08-27
1982-06-01
Reynolds, B. A.
Horology: time measuring systems or devices
Chronological
With pulse transforming means
357 42, 357 51, 368219, G04C 300, G04C 500
Patent
active
043331718
ABSTRACT:
An electronic timepiece comprising a quartz crystal oscillator for producing a time standard signal, a frequency divider, and a display driver. The electronic circuit comprises a digital logic circuit employing a complementary MOS integrated circuit (CMOS.multidot.IC). A diffusion resistor is formed in the N-type substrate of the CMOS transistor of the CMOS.multidot.IC by diffusing an impurity at the same time with the diffusion of the P-well for the N-channel MOS transistor of the CMOS transistor. Supply voltage of a battery is supplied to a part of the CMOS.multidot.IC through the diffusion resistor, whereby variation of the threshold voltage of the CMOST may be compensated.
REFERENCES:
patent: 3905188 (1975-09-01), Nishikubo et al.
patent: 4100565 (1978-07-01), Khajezadeh et al.
patent: 4300061 (1981-11-01), Mihalich et al.
Citizen Watch Co. Ltd.
Reynolds B. A.
Roskoski Bernard
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