| CPC H04N 25/57 (2023.01) [H04N 25/76 (2023.01)] | 20 Claims |
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1. A single exposure high dynamic range (HDR) analog front-end (AFE) comprising:
input signal circuitry configured to generate an input signal;
gain stage circuitry configured to
receive the input signal,
generate a high gain output signal based on the input signal, and
generate a low gain output signal based on the input signal;
a continuous-time filter configured to generate a filtered high gain output signal by filtering the high gain output signal;
comparator circuitry configured to
receive a ramp voltage,
generate a high gain comparison signal by comparing the filtered high gain output signal to the ramp voltage, and
generate a low gain comparison signal by comparing the low gain output signal to the ramp voltage; and
counter circuitry configured to
generate a high gain digital output signal based on the high gain comparison signal and using a clock signal, and
generate a low gain digital output signal based on the low gain comparison signal and using the clock signal.
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