Oscillators – With particular source of power or bias voltage – Regulated
Reexamination Certificate
2007-10-19
2010-02-16
Mis, David (Department: 2817)
Oscillators
With particular source of power or bias voltage
Regulated
C331S057000, C331S185000, C455S075000
Reexamination Certificate
active
07663447
ABSTRACT:
A stable frequency is outputted by an oscillator circuit including a constant current circuit which is electrically connected between a first terminal and a second terminal, a voltage controlled oscillator circuit in which an oscillation frequency fluctuates in accordance with a potential difference between power supply voltage terminals, an n-channel transistor, a p-channel transistor in which a gate-source voltage is set to be constant by the constant current circuit, and a capacitor, in which a source electrode of the p-channel transistor is electrically connected to the first terminal, a drain electrode of the p-channel transistor is electrically connected a drain electrode and a gate electrode of the n-channel transistor, a source electrode of the n-channel transistor is electrically connected to the second terminal, and a gate electrode of the n-channel transistor is electrically connected to the second terminal through the capacitor.
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Fish & Richardson P.C.
Mis David
Semiconductor Energy Laboratory Co,. Ltd.
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