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US 7,890,065 B1Granted
Temperature compensated power detector
AssigneeAnadigics, Inc.
InventorHenry Liwinski
Life of this patent
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Abstract
A temperature-compensated power detector for detecting variations in the power level of an RF signal. The temperature-compensated power detector includes a detector circuit and a temperature compensating circuit. The detector circuit detects the power level of an RF signal and provides an output voltage that corresponds to the power level of the RF signal. The temperature compensating circuit ensures that the output voltage of the temperature-compensated power detector is independent of changes in the temperature.
Claims13
A temperature-compensated power detector, the temperature-compensated power detector comprising:
- a. a detector circuit, the detector circuit comprising at least one first diode, the at least one first diode detecting a power variation in an input RF signal from an RF signal source, the detector circuit having a first temperature coefficient;
- and
- b. a temperature compensating circuit, the temperature compensating circuit comprising:
- i. at least one voltage regulator, the at least one voltage regulator providing a regulated voltage with a second temperature coefficient;
- and
- ii. at least one resistive divider, the at least one resistive divider being coupled to the at least one voltage regulator, the at least one resistive divider dividing each of the regulated voltage and the second temperature coefficient in a pre-defined ratio to provide a biasing voltage with a third temperature coefficient to the at least one first diode, wherein the third temperature coefficient corresponding to the biasing voltage is equal to the first temperature coefficient;
- wherein the biasing current passing through the at least one first diode will remain constant.
4 more elements
Dependencies are inferred from the claim text.