Patent ID: 9628728
Date: 2017-04-18
CPC Classifications: H03K,H04N

Claim:
1. A ramp signal generator comprising: a differential amplification unit suitable for receiving a reference voltage and a voltage of a transfer node, corresponding to the reference voltage as differential inputs; a driving unit suitable for receiving an output signal of the differential amplification unit and being coupled between the transfer node and a ramp ground voltage terminal; and a ramp signal generation unit suitable for generating a ramp signal based on a ramp supply voltage and the voltage of the transfer node, wherein the ramp signal generation unit comprises: a ramp current generation unit coupled between a ramp supply voltage terminal and a ramp signal output terminal, and suitable for generating a ramp current corresponding to the ramp signal; and a ramp resistor coupled between the ramp signal output terminal and the transfer node; wherein the ramp signal generator controls ramp ground bouncing to cancel noise caused by the ramp ground bouncing.