Patent ID: 11942963
Assignee: CHONGQING GIGACHIP TECHNOLOGY CO., LTD.
Field: Basic communication processes (Electrical engineering)
Classification: CPC H  G  Y | IPC G  H

Claim 0:
1. A follow-hold switch circuit, comprising:
a follower;
a sampling sub-circuit, for voltage sampling;
a bootstrap-control sub-circuit, which provides a bootstrap voltage to the sampling sub-circuit when the follow-hold switch circuit is in a following state; and
a sampling-switch-control sub-circuit, which provides a common-mode voltage to a bootstrap capacitor in the bootstrap-control sub-circuit when the follow-hold switch circuit is in a holding state;
wherein the follower is connected to an output of the sampling sub-circuit, the sampling sub-circuit is connected to the bootstrap-control sub-circuit and the sampling-switch-control sub-circuit via a sample switch, respectively;
wherein the follower comprises at least a first MOS transistor and a constant current source, a drain of the first MOS transistor is connected to a supply voltage, a gate of the first MOS transistor is connected to the sampling sub-circuit, and a source of the first MOS transistor is connected to a positive terminal of the constant current source; wherein a negative terminal of the constant current source is grounded.