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Takeuchi; Hisato
Kanagawa, JP
No. of patents:

Patent Number Title Of Patent Date Issued
7847645 Oscillation control apparatus and oscillator December 7, 2010
An oscillation control apparatus is provided with: an oscillating unit for oscillating an oscillating element; an output amplifying circuit having two pieces of same types of transistors series-connected to each other, for outputting a signal from a junction point between the two transis
7808333 IC for control of temperature-compensated crystal oscillator October 5, 2010
A temperature-compensated crystal oscillator includes a mode selector circuit 100, a control logic serial.cndot.interface 200, a PROM circuit 300, an oscillation control circuit 400 and an oscillation circuit 500, and has, as terminals, a power terminal (VCC/CLK) 11, an input terminal
7633350 Function generation circuit December 15, 2009
A first order function generation circuit receives a signal from a temperature sensor circuit, and generates a first order function control signal V1 that is affected by the ambient temperature. A fourth order and fifth order approximation function generation circuit receives signals
7579917 Output circuit for oscillator August 25, 2009
The object of the present invention is to provide a crystal oscillator with one IC capable of effectively responding to specifications or a frequency of an installed set, an output terminal of the oscillator 1 is connected to an input terminal of the inverter 2, an output terminal of
7015767 Function generator and temperature compensated crystal oscillator March 21, 2006
With first, second and third current exchanger circuits cascaded, a current in proportion to a difference between an ambient temperature Ta and a reference temperature Tr is input to the first current exchanger circuit. The first current exchanger circuit supplies a current in propor
6292066 Function generator, crystal oscillation device and method of adjusting crystal oscillation devic September 18, 2001
A temperature compensating crystal oscillation device includes a constant voltage circuit (12) for outputting a predetermined voltage independent of the ambient temperature, a temperature sensor circuit (13) for outputting a voltage in proportion to the ambient temperature, and a control
5719533 Function generator February 17, 1998
In order to realize highly accurate temperature compensation of a crystal oscillation frequency, a current in proportion to the cube of a difference between an ambient temperature T.sub.a and a reference temperature T.sub.0 is generated. For this purpose, provided are a first series circ

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