US 2023/0155580 A1Published application

Pre-driver circuit and driver device

AssigneeRealtek Semiconductor Corp.

InventorsYI TING LIU, ZHIXIAN GAO

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Abstract

The present disclosure discloses a pre-driver circuit and a driving device. The pre-driver circuit includes a first transistor, a second transistor, and a resistive component. The first transistor has a first terminal coupled to a first voltage, a second terminal for outputting a pre-driving signal, and a control terminal for receiving a first control signal. The second transistor has a first terminal coupled to the second terminal of the first transistor, a second terminal coupled to a second voltage, and a control terminal for receiving the first control signal. The resistive component has a first terminal coupled to the first terminal of the second transistor, and a second terminal coupled to the second terminal of the second transistor. One of the first transistor and the second transistor is a P-type transistor, and the other is an N-type transistor.

Claims20

Dependent claims

A pre-driver circuit, configured to provide a pre-driving signal to drive a main driver circuit, comprising:

a first transistor, having a first terminal, a second terminal and a control terminal, wherein the first terminal of the first transistor is coupled to a first voltage, the second terminal of the first transistor is configured to output the pre-driving signal, and the control terminal of the first transistor is configured to receive a first control signal;
a second transistor, having a first terminal, a second terminal and a control terminal, wherein the first terminal of the second transistor is coupled to the second terminal of the first transistor, the second terminal of the second transistor is coupled to a second voltage, and the control terminal of the second transistor is configured to receive the first control signal;
and
a resistive component, having a first terminal and a second terminal, wherein the first terminal of the resistive component is coupled to the first terminal of the second transistor, and the second terminal of the resistive component is coupled to the second terminal of the second transistor;
wherein one of the first transistor and the second transistor is a P-type transistor, and the other is an N-type transistor.

2 more elements

A driving device, comprising:

a first pre-driver circuit, comprising:
a first transistor, having a first terminal, a second terminal and a control terminal, wherein the first terminal of the first transistor is coupled to a first voltage, the second terminal of the first transistor is configured to output a first pre-driving signal, and the control terminal of the first transistor is configured to receive a first control signal;
a second transistor, having a first terminal, a second terminal and a control terminal, wherein the first terminal of the second transistor is coupled to the second terminal of the first transistor, the second terminal of the second transistor is coupled to a second voltage, and the control terminal of the second transistor is configured to receive the first control signal;
and
a first resistive component, having a first terminal and a second terminal, wherein the first terminal of the first resistive component is coupled to the first terminal of the second transistor, and the second terminal of the first resistive component is coupled to the second terminal of the second transistor;
and
a main driver circuit, comprising a third transistor, having a first terminal, a second terminal and a control terminal, wherein the first terminal of the third transistor is configured to receive a power supply, the second terminal of the third transistor is configured to output a first output signal, and the control terminal of the third transistor is configured to receive the first pre-driving signal;
wherein one of the first transistor and the second transistor is a P-type transistor, and the other is an N-type transistor.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/936,077Filed 28 Sep 2022
Priority: CN 202111346394.215 Nov 2021
Published: 18 May 2023
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

H03K 3/35613
Using additional transistors in the input circuit: the input circuit having a differential configuration
H03K 19/00361
Modifications for eliminating interference or parasitic voltages or currents: in field effect transistor circuits
H03K 19/018521
Interface arrangements: of complementary type, e.g. CMOS
H03K 19/018528
Of complementary type, e.g. CMOS: with at least one differential stage

Family

US 12,136,919 B2Related patent
US 2023/0155580 A1This patent

From the US filing history. Foreign family members aren’t listed.

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