Voltage-controlled oscillator and non-contact IC card including

Details Voltage-controlled oscillator and non-contact IC card including Voltage-controlled oscillator and non-contact IC card including

1996-11-01

2000-02-22

Mis, David

Oscillators

Solid state active element oscillator

Transistors

331 65, 331 68, 331143, 331177R, H03B 506, H03B 524

Patent

active

060284927

ABSTRACT:
A voltage-controlled oscillator VCO capable of reliably generating an oscillation even if it, after stopping with electric charges remaining on both of its capacitors, is restarted under the same conditions. Even if the VCO is started with charges remaining on capacitors, N-channel transistors are both turned on because outputs of differential circuits are both at H level. N-channel transistors are both turned off because their gates are connected with the drains of the N-channel transistors. Therefore, in no case, the levels at points C and D as outputs on both sides of latch circuit go to L level at the same time.

REFERENCES:
patent: 3702446 (1972-11-01), Steudel
patent: 4083020 (1978-04-01), Goldberg
patent: 4623851 (1986-11-01), Abou
patent: 4644300 (1987-02-01), Ibe et al.
patent: 5097226 (1992-03-01), Pascucci et al.
patent: 5341113 (1994-08-01), Baron et al.
patent: 5614871 (1997-03-01), Miyabe

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