US 12,136,919 B2
Pre-driver circuit and driver device
Yi Ting Liu, Hsinchu (TW); and Zhixian Gao, Suzhou (CN)
Assigned to REALTEK SEMICONDUCTOR CORPORATION, Hsinchu (TW)
Filed by REALTEK SEMICONDUCTOR CORPORATION, Hsinchu (TW)
Filed on Sep. 28, 2022, as Appl. No. 17/936,077.
Claims priority of application No. 202111346394.2 (CN), filed on Nov. 15, 2021.
Prior Publication US 2023/0155580 A1, May 18, 2023
Int. Cl. H03K 3/356 (2006.01); H03K 19/0185 (2006.01)
CPC H03K 3/35613 (2013.01) [H03K 19/018521 (2013.01)] 18 Claims
OG exemplary drawing
 
1. 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; and
wherein a voltage swing of the pre-driving signal is smaller than a voltage difference between the first voltage and the second voltage.