Low power receiver and related circuits
AssigneeUniversity of Virginia Patent Foundation
InventorsJesse Moody, Anjana Dissanayake, Benton H. Calhoun, Steven M. Bowers
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Abstract
Low power radio frequency (RF) receivers and related circuits are described.
Claims31
A radio frequency (RF) receiver, comprising:
- an RF gain stage configured to amplify an RF signal, the RF signal being characterized by a bit duration;
- an envelope detector following the RF gain stage;
- baseband circuitry following the envelope detector, the baseband circuitry being configured to detect a modulating signal transmitted with the RF signal;
- and
- enable circuitry configured to enable the RF gain stage to sample the RF signal using a sampling duration, wherein the sampling duration is configurable down to less than 10% of the bit duration.
An envelope detector, comprising a plurality of N-type transistors and a plurality of P-type transistors, the N-type transistors and P-type transistors being configured in a plurality of stages, each stage including an N-type transistor and a P-type transistor connected to each other at corresponding source terminals and capacitively coupled to ground at corresponding drain terminals, the N-type transistor in each stage including a gate terminal configured to receive a first bias voltage, the P-type transistor in each stage including a gate terminal configured to receive a second bias voltage, wherein the connected source terminals of each stage are configured to receive a radio frequency (RF) input signal, wherein the first bias voltage controls a channel impedance for each of the N-type transistors, and wherein the second bias voltage controls a channel impedance for each of the P-type transistors.
Dependencies are inferred from the claim text.