US 12,216,485 B2
Output circuit and related control method with pumping compensation
Jen-Yi Lin, Hsinchu (TW)
Assigned to NOVATEK Microelectronics Corp., Hsin-Chu (TW)
Filed by NOVATEK Microelectronics Corp., Hsin-Chu (TW)
Filed on Jul. 8, 2021, as Appl. No. 17/369,974.
Prior Publication US 2023/0010835 A1, Jan. 12, 2023
Int. Cl. G05F 1/56 (2006.01)
CPC G05F 1/56 (2013.01) 7 Claims
OG exemplary drawing
 
1. An output circuit, comprising:
an output driver, comprising a signal input terminal, a signal output terminal and a first power receiving terminal, to output a digital signal through the signal output terminal;
a voltage regulator, coupled to the first power receiving terminal of the output driver, to supply power to the output driver through the first power receiving terminal;
a control circuit, coupled to the signal input terminal of the output driver; and
a charge pump circuit, coupled to the control circuit and the first power receiving terminal of the output driver, to output compensation charges to the output driver through the same first power receiving terminal;
wherein the charge pump circuit is configured to output the compensation charges to the first power receiving terminal of the output driver according to an input/output (I/O) internal signal of the output driver.