Oscillators – Plural oscillators – Selectively connected to common output or oscillator...
Patent
1994-11-07
1995-09-26
Mis, David
Oscillators
Plural oscillators
Selectively connected to common output or oscillator...
331108C, 331116FE, 331158, 331173, 326 58, 327298, H03B 506, H03B 536
Patent
active
054537193
ABSTRACT:
Disclosed herein is an oscillator circuit generating an oscillation signal in response to a resonant element in a first mode and to an external clock signal in a second mode. This oscillator circuit comprises a tri-state inverter circuit and a transfer circuit between the input and output nodes of the tri-state inverter circuit, and the output node of the tri-state inverter circuit is brought into a high impedance condition when an external clock signal is used and into an active state when the resonant element is employed.
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Kuboki, et al., "Design Considerations for Low-Voltage Crystal Oscillator Circuit in a 1.8 V Single Chip Microprocessor", IEICE Transactions on Electronics, VE76-C N5M, May 1993, pp. 701-707.
Mis David
NEC Corporation
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