Patent ID: 11921195
Assignee: ARBE ROBOTICS LTD.
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 10:
11. A radio frequency built in self-test (RF BIST) circuit, comprising:
a plurality of transmitter circuits, including at least a first transmitter circuit operative to transmit a first radar signal and a second transmitter circuit operative to transmit a second radar signal later in time after said first signal is transmitted;
a plurality of receiver circuits, including at least a first receiver circuit and a second receiver circuit, each receiver circuit operative to receive a reflected radar signal including said first radar signal and said second radar signal;
a test circuit operatively coupled to said plurality of receiver circuits and adapted to analyze received radar signals;
said test circuit operative to:
detect a transmitter fault by utilizing said second transmitter circuit to verify the validity of said first transmitter circuit whereby said second radar signal is transmitted from said second transmitter circuit;
declare a faulty first transmitter circuit if both said first receiver circuit and said second receiver circuit do not detect a valid received first radar signal, and if both of said first receiver circuit and said second receiver circuit detect a valid received second radar signal;

said test circuit operative to:
detect a receiver fault by utilizing said second transmitter circuit to verify the validity of said first receiver circuit whereby said second radar signal is transmitted from said second transmitter circuit; and
declare a faulty first receiver circuit if a correlation of said first radar signals received at said first receiver circuit and said receiver circuit does not exceed a first threshold, and if a correlation of said first radar signal and said second radar signal received at said first receiver circuit does not exceed a second threshold.