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US 11,146,299 B2Granted
Wireless receiver apparatus and method
AssigneeEveractive, Inc.
InventorKuo-Ken Huang
Life of this patent
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Abstract
Embodiments of the invention include a wakeup receiver (WRX) featuring a charge-domain analog front end (AFE) with parallel radio frequency (RF) rectifier, charge-transfer summation amplifier (CTSA), and successive approximation analog-to-digital converter (SAR ADC) stages. The WRX operates at very low power and exhibits above-average sensitivity, random pulsed interferer rejections, and yield over process.
Claims21
A circuit for radio frequency (RF) signal to baseband conversion, comprising:
- an RF rectifier circuit configured to receive an RF signal, wherein the RF rectifier processes the received RF signal as multiple signal paths M and with multiple stages N per path;
- an amplifier circuit configured to receive output from the RF rectifier circuit and perform summation and amplification operations on the received output from the multiple signal paths M;
- an analog-to-digital (ADC) circuit configured to receive an output of the amplifier circuit, and to convert the received output to a digital baseband format;
- and
- a baseband physical layer configured to receive signals from the ADC and to output a fast wakeup signal and a secure wakeup signal, wherein a wireless network in which the circuit resides is configurable for either fast wakeup signals of only a Sync Word or secure wakeup signals with a full wakeup receiver beacon packet with cryptographic checksum that includes a payload for data transfer without the need for a high-power receiver.
2 more elements
A charge domain amplifier comprising:
- circuitry for receiving multiple input branches;
- circuitry for summing the multiple input branches to a single Output;
- and
- circuitry for providing both summation and amplification in the time domain, wherein digital information is stored as sampled charge on capacitors obtained from a radio frequency (RF) source, and wherein an output of the amplifier comprises a sample capacitor of an analog-to-digital converter (ADC).
1 more element
A method for receiving and processing radio frequency (RF) signals, the method comprising:
- deploying a circuit for radio frequency (RF) signal to baseband conversion, wherein the circuit comprises,
- an RF rectifier circuit configured to receive an RF signal;
- and
- an amplifier circuit configured to receive output from the RF rectifier circuit, wherein the method comprises;
- the circuit processing the received RF signal as multiple, parallel input signal paths using the RF rectification circuit;
- the circuit performing summation and amplification operations on the output of the RF rectification circuit in the time domain using the amplifier circuit;
- the circuit generating a signal to an analog-to-digital converter (ADC circuits) from the amplifier circuit, wherein the ADC converts the received signal from the amplifier circuit to a digital baseband format;
- and
- a baseband physical layer configured to receive signals from the ADC and to output a fast wakeup signal and a secure wakeup signal, wherein a wireless network in which the circuit resides is configurable for either fast wakeup signals of only a Sync Word or secure wakeup signals with a full wakeup receiver beacon packet with cryptographic checksum that includes a payload for data transfer without the need for a high-power receiver.
6 more elements
Dependencies are inferred from the claim text.