Adjustable power sensor
First Claim
Patent Images
1. An apparatus, comprising:
- a measurement detector configured to receive an input signal;
a variable current source configured to provide first and second currents of substantially equal magnitude to a reference detector and the measurement detector, respectively, wherein the reference detector and the measurement detector are thermally coupled; and
a circuit configured to adjust the first and second currents by substantially equal amounts to correspondingly adjust a measurement characteristic of the measurement detector.
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Abstract
A power sensor applies respective first and second currents having substantially equal magnitudes to a reference detector and a measurement detector that are thermally coupled to each other. The power sensor senses an input signal with the measurement detector, and it adjusts the respective magnitudes of the first and second currents by substantially equal amounts to correspondingly adjust a measurement characteristic of the measurement detector.
17 Citations
17 Claims
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1. An apparatus, comprising:
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a measurement detector configured to receive an input signal; a variable current source configured to provide first and second currents of substantially equal magnitude to a reference detector and the measurement detector, respectively, wherein the reference detector and the measurement detector are thermally coupled; and a circuit configured to adjust the first and second currents by substantially equal amounts to correspondingly adjust a measurement characteristic of the measurement detector. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An apparatus, comprising:
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a measurement detector configured to receive an input signal; a variable current source configured to provide first and second currents of substantially equal magnitude to a reference detector and the measurement detector, respectively, wherein the reference detector and the measurement detector are thermally coupled; and a circuit configured to adjust the first and second currents by substantially equal amounts to correspondingly adjust a measurement characteristic of the measurement detector, the circuit comprising; a first current mirror configured to regulate a first measurement voltage apparent at a positive output terminal of the measurement detector and a first reference voltage apparent at a positive output terminal of the reference detector; and a second current mirror configured to regulate a second measurement voltage apparent at a negative output terminal of the measurement detector and a second reference voltage apparent at a negative output terminal of the reference detector. - View Dependent Claims (8, 9, 12, 13)
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10. An apparatus, comprising:
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a measurement detector configured to receive an input signal; a variable current source configured to provide first and second currents of substantially equal magnitude to a reference detector and the measurement detector, respectively, wherein the reference detector and the measurement detector are thermally coupled, the reference detector and measurement detector being located on different chips, and thermally coupled through a thermal conduit connected between the different chips; and a circuit configured to adjust the first and second currents by substantially equal amounts to correspondingly adjust a measurement characteristic of the measurement detector. - View Dependent Claims (11, 14, 15, 16, 17)
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Specification