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US 12,278,722 B2Granted
Circuits and methods for wake-up receivers
AssigneeThe Trustees of Columbia University in the City of New York
InventorsVivek Mangal, Peter R. Kinget
Life of this patent
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Abstract
Circuit for wake-up receivers are provide. In some embodiments, the wake-up receivers include self-mixers that receive a gate bias voltage. Some of the self-mixers are single ended and some are differential. In some embodiments, the wake-up receivers include a matching network that is connected to the input of the self-mixer. In some embodiments, the wake-up receivers include a low frequency path connected to the output of the self-mixer. In some embodiments, the wake-up receivers include a high frequency path connected to the output of the self-mixer. In some embodiments, the wake-up receivers are configured to receive an encoded bit stream. In some embodiments, the wake-up receivers are configured to wake-up another receiver.
Claims21
A receiver comprising:
- a self-mixer including a plurality of inputs and an output;
- a matched filter having an input and an output, wherein the input of the matched filter is coupled to the output of the self-mixer;
- and
- a charge pump having an input coupled to the output of the matched filter and having an output coupled to a first input of the plurality of inputs of the self-mixer,
- wherein the self-mixer comprises:
- a first Negative-Channel Metal-Oxide-Semiconductor (NMOS) transistor having a source, a drain, and a gate, wherein the drain of the first NMOS transistor is coupled to the output of the self mixer;
- a second NMOS transistor having a source, a drain, and a gate, wherein the drain of the second NMOS transistor is connected to the source of the first NMOS transistor;
- a third NMOS transistor having a source, a drain, and a gate, wherein the drain of the third NMOS transistor is connected to the source of the second NMOS transistor and wherein the gate of the third NMOS transistor is connected to the gate of the first NMOS transistor;
- a fourth NMOS transistor having a source, a drain, and a gate, wherein the drain of the fourth NMOS transistor is connected to the source of the third NMOS transistor and wherein the gate of the fourth NMOS transistor is connected to the gate of the second NMOS transistor;
- a first capacitor having a first side and a second side, wherein the first side of the first capacitor is connected to a second input of the plurality of inputs of the self-mixer and wherein the second side of the first capacitor is connected to the source of the first NMOS transistor;
- a second capacitor having a first side and a second side, wherein the first side of the second capacitor is connected to the first side of the first capacitor and wherein the second side of the second capacitor is connected to the gate of the first NMOS transistor;
- a third capacitor having a first side and a second side, wherein the first side of the third capacitor is connected to the first side of the first capacitor and wherein the second side of the third capacitor is connected to the source of the third NMOS transistor;
- and
- a resistor have a first side and a second side, wherein the first side of the resistor is connected to a bias voltage and to the gate of the fourth NMOS transistor and wherein the second side of the resistor is connected to the gate of the third NMOS transistor.
11 more elements
A receiver comprising:
- a self-mixer including a plurality of inputs and an output;
- a matched filter having an input and an output, wherein the input of the matched filter is coupled to the output of the self-mixer;
- and
- a charge pump having an input coupled to the output of the matched filter and having an output coupled to a first input of the plurality of inputs of the self-mixer,
- wherein the matched filter comprises at least two oscillators and a phase frequency detector, and
- wherein the phase frequency detector has at least a first output and a second output, and wherein the charge pump comprises a first current source that is responsive to the first output of the phase frequency detector and a second current source that is responsive to the second output of the phase frequency detector.
3 more elements
A receiver comprising:
- a self-mixer including a plurality of inputs and an output;
- a matched filter having an input and an output, wherein the input of the matched filter is coupled to the output of the self-mixer;
- and
- a charge pump having an input coupled to the output of the matched filter and having an output coupled to a first input of the plurality of inputs of the self-mixer,
- wherein the matched filter comprises at least two oscillators and a phase frequency detector, and
- wherein the phase frequency detector has at least a first output and a second output, further comprising a comparator having at least a first input connected to the first output of the phase frequency detector and a second input connected to the second output of the phase frequency detector.
3 more elements
Dependencies are inferred from the claim text.