US 11,687,105 B2
Driving device
Kuo Wei Cheng, Hsinchu (TW)
Assigned to Novatek Microelectronics Corp., Hsinchu (TW)
Filed by NOVATEK MICROELECTRONICS CORP., Hsinchu (TW)
Filed on Jun. 30, 2021, as Appl. No. 17/363,472.
Prior Publication US 2023/0004179 A1, Jan. 5, 2023
Int. Cl. H03K 17/687 (2006.01); G05F 1/56 (2006.01); H03K 19/0944 (2006.01); G05F 1/44 (2006.01); H03K 17/06 (2006.01)
CPC G05F 1/56 (2013.01) [G05F 1/44 (2013.01); H03K 17/063 (2013.01); H03K 17/6871 (2013.01); H03K 19/0944 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A driving device, comprising:
a voltage regulator coupled between a first high-voltage terminal and an output terminal of the driving device and configured to receive a first high voltage of the first high-voltage terminal, wherein the voltage regulator is configured to step down the first high voltage to generate a supply voltage;
a voltage generator coupled to a second high-voltage terminal and the output terminal of the driving device and configured to provide a reference voltage for the output terminal of the driving device, wherein the reference voltage is substantially lower than the supply voltage; and
a first N-channel metal-oxide-semiconductor field effect transistor (NMOSFET) coupled between the output terminal of the driving device and a low-voltage terminal;
wherein the voltage generator includes:
a second N-channel metal-oxide-semiconductor field effect transistor (NMOSFET) coupled to the second high-voltage terminal and the voltage regulator;
a third N-channel metal-oxide-semiconductor field effect transistor (NMOSFET) coupled to the second high-voltage terminal and the output terminal of the driving device;
a first electronic switch coupled between the second NMOSFET and the third NMOSFET;
a fourth N-channel metal-oxide-semiconductor field effect transistor (NMOSFET) coupled to the output terminal of the driving device, the third NMOSFET, and the low-voltage terminal;
a second electronic switch coupled between the fourth NMOSFET and a high bias terminal; and
a signal controller coupled to control terminals of the first electronic switch and the second electronic switch.