IMAGE SENSOR INCLUDING SPREAD SPECTRUM CHARGE PUMP

摘要

A method of reducing harmonic tones of noise in an image sensor includes generating a system clock and generating a random clock in response to the system clock. A charge pump is clocked with the random clock to generate a boosted voltage. The boosted voltage is provided to a pixel array of the image sensor. Image charge is readout from pixel cells of the pixel array using the boosted voltage from the charge pump.

主权项

1. A method of reducing harmonic tones of noise in an image sensor, comprising:
generating a system clock; generating a random clock in response to the system clock; clocking a charge pump with the random clock to generate a boosted voltage; providing the boosted voltage to a pixel array of the image sensor; and reading out image charge from pixel cells of the pixel array using the boosted voltage from the charge pump.