Oscillators – Frequency stabilization – Temperature or current responsive means in circuit
Reexamination Certificate
2008-06-06
2010-06-22
Chang, Joseph (Department: 2817)
Oscillators
Frequency stabilization
Temperature or current responsive means in circuit
C327S512000
Reexamination Certificate
active
07741925
ABSTRACT:
A temperature detector circuit using a MOS transistor capable of reducing manufacture variation of a mobility and realizing stable output characteristics which are not affected by temperature dependency may be offered. In one example, the temperature detector circuit includes a pair of depression type transistors to output a voltage which is proportional to temperature from a connecting point of a source of a first transistor and a drain of a second transistor. The transistors are the same conducted type of current and are formed in different channel size, which are connected between power supplies in series, and have a configuration in which first transistor's gate and source are connected each other and a first transistor's drain is connected with a second power supply and second transistor's gate and drain are connected each other and a second transistor's source is connected with a first power supply.
REFERENCES:
patent: 7078954 (2006-07-01), Watanabe
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patent: 2002-108465 (2002-04-01), None
Chang Joseph
Dickstein & Shapiro LLP
Ricoh & Company, Ltd.
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