US 12,021,544 B2
Analog-to-digital conversion circuit, analog-to-digital conversion device, and digital x-ray imaging system
Rong Wu, Irvine, CA (US); Jieyou Zhao, Shanghai (CN); and Haichao Zhang, Shanghai (CN)
Assigned to Shanghai United Imaging Microelectronics Technology Co., Ltd., Shanghai (CN)
Filed by Shanghai United Imaging Microelectronics Technology Co., Ltd., Shanghai (CN)
Filed on Mar. 3, 2022, as Appl. No. 17/685,935.
Prior Publication US 2022/0196855 A1, Jun. 23, 2022
Int. Cl. H03M 1/18 (2006.01); G01T 1/17 (2006.01); H03M 1/16 (2006.01); H03M 1/36 (2006.01)
CPC H03M 1/164 (2013.01) [G01T 1/17 (2013.01); H03M 1/188 (2013.01); H03M 1/363 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An analog-to-digital conversion (ADC) circuit, comprising:
a first reference voltage source;
a second reference voltage source;
a first analog-to-digital converter connected to the first reference voltage source;
a second analog-to-digital converter connected to the second reference voltage source;
a connecting circuit connected to the first analog-to-digital converter and the second analog-to-digital converter, respectively; and
a current source having negative temperature coefficient, configured to be connected to the first reference voltage source and the second reference voltage source, respectively.