US 12,276,502 B2
Continuous monitoring of gyroscope sensor forced-to-rebalance loop electronics
Mohammad Maymandi Nejad, Hopkinton, MA (US); and Ronald J. Lipka, Northborough, MA (US)
Assigned to PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD, Osaka (JP)
Filed by Panasonic Intellectual Property Management Co., Ltd., Osaka (JP)
Filed on Aug. 24, 2022, as Appl. No. 17/821,849.
Prior Publication US 2024/0068812 A1, Feb. 29, 2024
Int. Cl. G01C 19/5776 (2012.01); H04B 1/04 (2006.01)
CPC G01C 19/5776 (2013.01) [H04B 1/0458 (2013.01); H04B 2001/0408 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A gyro sensor circuit, comprising:
a gyro sensor generating a radio frequency (RF) sensing signal according to an angular movement of the gyro sensor,
an RF sense path configured to receive and process the RF sensing signal, the RF sense path comprising:
a first chopper comprising a chopping switch, and configured to chop the RF signal at a first chopping frequency to generate a chopped signal;
a demodulator coupled with a local oscillator (LO) generating a LO signal, the demodulator configured to mix the chopped signal with the LO signal to output a baseband signal; and
a feedback loop configured to feed back the baseband signal to the gyro sensor, the feedback loop comprising:
a connection path configured to connect the LO oscillator to the feedback loop, providing the LO signal as a first output test voltage;
a chopper re-modulator configured to chop and modulate the baseband signal at a frequency of the LO signal to generate a modulated feedback signal;
a first amplifier configured to amplify the modulated feedback signal; and
a test voltage monitor configured to extract a component corresponding to the LO signal from the modulated feedback signal, and compare a voltage of the extracted component with an expected value determined based on a gain of the first amplifier.