Patent ID: 9660529
Date: 2017-05-23
CPC Classifications: H02M,H03K

Claim:
1. A transistor circuit of low shutoff-state current comprising: a first transistor, a transistor string and a switch; wherein the first transistor is connected to the transistor string in series; wherein: the switch is configured to turning off the transistor circuit; the first transistor is configured to reduce a shut-off state current flowing therethrough using a negative feedback effect of the transistor string if the transistor circuit is in shut-off state; the transistor string is configured to reduce a shut-off state current flowing therethrough using a negative voltage difference between a gate electrode and a source electrode and a transistor body effect; and a gate electrode of the first transistor is connected to the gate electrode of the transistor string, a source electrode of the first transistor, a body region of the first transistor, and a body region of the transistor string are connected to a common terminal, a drain electrode of the first transistor is connected to the source electrode of the transistor string, one end of the switch is connected to the gate electrode of the first transistor, another end of the switch is connected to the common terminal, the switch is controlled by a switch control end; wherein, the gate electrode of the first transistor, the drain electrode of the transistor string, the switch control end comprise a connection node of the circuit and external circuits, the common terminal is a power supply or ground.