Telecommunications – Transmitter – Power control – power supply – or bias voltage supply
Reexamination Certificate
2006-09-19
2006-09-19
Tran, Pablo N. (Department: 2618)
Telecommunications
Transmitter
Power control, power supply, or bias voltage supply
C455S169100, C455S289000, C455S298000, C455S299000, C323S312000
Reexamination Certificate
active
07110729
ABSTRACT:
A constant current source for generating a constant reference current that is relatively temperature insensitive. The constant current source comprises: i) first circuitry for generating a first output current that increases with increases in temperature; ii) second circuitry for generating a second output current that decreases with increases in temperature; and iii) a current combiner circuit that combines the first and second output currents to thereby generate the constant reference current. A change in the first output current caused by a temperature change is at least partially offset by a change in the second output current caused by the temperature change.
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National Semiconductor Corporation
Tran Pablo N.
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