Low power radio frequency signal detector
First Claim
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1. A pull down circuitry comprising:
- a first set of transistors;
a bias input circuitry coupled to the first set of transistors; and
a differential signal input circuitry coupled to the first set of transistors;
wherein the bias input circuitry is configured to apply bias to each of the first set of transistors and the differential signal input circuitry is configured to apply a pair of differential signals to the first set of transistors to increase or decrease the bias applied by the bias input circuitry.
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Abstract
A low power radio frequency (RF) signal detector comprising a set of transistors, a bias input circuitry configured to apply bias to each of the set of transistors, and a differential signal input circuitry configured to apply a pair of differential signals to the set of transistors, wherein the pair of differential signals increases or decreases bias applied to the set of transistors to achieve low power, high frequency RF signal detection.
4 Citations
21 Claims
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1. A pull down circuitry comprising:
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a first set of transistors; a bias input circuitry coupled to the first set of transistors; and a differential signal input circuitry coupled to the first set of transistors; wherein the bias input circuitry is configured to apply bias to each of the first set of transistors and the differential signal input circuitry is configured to apply a pair of differential signals to the first set of transistors to increase or decrease the bias applied by the bias input circuitry. - View Dependent Claims (2, 3, 4, 5)
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6. A radio frequency signal detector comprising:
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a first set of transistors; a bias input circuitry coupled to the first set of transistors and configured to apply bias to each of the first set of transistors; a differential signal input circuitry coupled to the first set of transistors and configured to apply a pair of differential signals to the first set of transistors to increase or decrease the bias applied by the bias input circuitry; a comparator configured to lower voltage output when the pair of differential signals is applied to the first set of transistors; and an output generator configured to generate an output signal reflective of the voltage output of the comparator when the voltage output from the comparator is lowered, wherein transistors of the first set of transistors are configured to turn on and off alternatively when the bias applied by the bias input circuitry is increased or decreased by the application of the pair of differential signals by the differential signal input circuitry, and the comparator is configured to lower the voltage output when any of the first set of transistors is turned on. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A digital isolator comprising,
a transmitter configured to transmit a radio frequency signal; -
a receiver configured to receive the radio frequency signal transmitted by the transmitter; and an isolation barrier configured to transmit the radio frequency signal transmitted by the transmitter to the receiver through a capacitor, wherein the receiver comprises, a first set of transistors; a bias input circuitry coupled to the first set of transistors and configured to apply bias to each of the first set of transistors; a differential signal input circuitry coupled to the first set of transistors and configured to apply a pair of differential signals to the first set of transistors to increase or decrease the bias applied by the bias input circuitry; a comparator configured to lower voltage output when the pair of differential signals is applied to the first set of transistors; and an output generator configured to generate an output signal reflective of the voltage output of the comparator when the voltage output from the comparator is lowered, wherein transistors of the first set of transistors are configured to turn on and off alternatively when the bias applied by the bias input circuitry is increased or decreased by the application of the pair of differential signals by the differential signal input circuitry, and the comparator is configured to lower the voltage output when any of the first set of transistors is turned on. - View Dependent Claims (17, 18, 19, 20, 21)
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Specification