US 12,243,615 B2
Calibration circuit and method with reference voltage generator and comparator
Siman Li, Hefei (CN)
Assigned to CHANGXIN MEMORY TECHNOLOGIES, INC., Hefei (CN)
Filed by CHANGXIN MEMORY TECHNOLOGIES, INC., Hefei (CN)
Filed on Jan. 11, 2023, as Appl. No. 18/152,945.
Claims priority of application No. 202210379098.0 (CN), filed on Apr. 12, 2022.
Prior Publication US 2023/0326497 A1, Oct. 12, 2023
Int. Cl. G11C 7/10 (2006.01); H03K 19/00 (2006.01)
CPC G11C 7/1048 (2013.01) [H03K 19/0005 (2013.01); G11C 2207/2254 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A calibration circuit, comprising:
a calibration resistance module, wherein an output voltage of the calibration resistance module varies with a first parameter, and the first parameter comprises at least one of a fabrication process of the calibration circuit, a power supply voltage of the calibration circuit, or an operating temperature of the calibration circuit;
a reference voltage generation module, configured to receive a first comparison signal, to generate a corresponding reference voltage; and
a comparison module, coupled to the calibration resistance module and the reference voltage generation module, and configured to compare the output voltage with the reference voltage and generate the first comparison signal, and
a latch, provided with an input terminal coupled to the comparison module and an output terminal coupled to an internal circuit, and configured to latch the first comparison signal in response to a variation of the first comparison signal and output the first comparison signal to the internal circuit at a corresponding time.