Voltage-controlled oscillator and non-contact IC card including voltage-controlled oscillator
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United States of America Patent
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-
Feb 22, 2000
Grant Date -
N/A
app pub date -
Nov 1, 1996
filing date -
Jun 12, 1996
priority date (Note) -
Expired
status (Latency Note)
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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.
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