Oscillators – Plural oscillators – Selectively connected to common output or oscillator...
Patent
1994-08-01
1995-05-16
Grimm, Siegfried H.
Oscillators
Plural oscillators
Selectively connected to common output or oscillator...
331 59, 331116FE, H03B 536
Patent
active
054164451
ABSTRACT:
A clock pulse generator has a three-state inverter and a transfer gate forming in combination a feedback loop for oscillating an output clock signal in cooperation with a quartz resonator in an internal oscillation mode, and the three-state inverter enters into high-impedance state in an external oscillation mode so that an external clock signal is transferred to the output node of the three-state inverter without malfunction.
REFERENCES:
patent: 3790881 (1974-02-01), Smith
patent: 4196404 (1980-04-01), Ebihara
patent: 4871982 (1989-10-01), Williams et al.
patent: 5369377 (1994-11-01), Benhamida
Grimm Siegfried H.
NEC Corporation
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