US 11,923,041 B2
Signal generator for controlling timing of signal in memory device
Xiu-Li Yang, Shanghai (CN); He-Zhou Wan, Shanghai (CN); Mu-Yang Ye, Nanjing (CN); Lu-Ping Kong, Nanjing (CN); and Ming-Hung Chang, Tainan (TW)
Assigned to TAIWAN SEMICONDUCTOR MANUFACTURING CO., LTD., Hsinchu (TW); TSMC NANJING COMPANY LIMITED, Nanjing (CN); and TSMC CHINA COMPANY LIMITED, Shanghai (CN)
Filed by TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY, LTD., Hsinchu (TW); TSMC NANJING COMPANY LIMITED, Nanjing (CN); and TSMC CHINA COMPANY LIMITED, Shanghai (CN)
Filed on Jul. 5, 2022, as Appl. No. 17/857,743.
Application 17/857,743 is a continuation of application No. 17/157,746, filed on Jan. 25, 2021, granted, now 11,398,261.
Claims priority of application No. 202011311624.7 (CN), filed on Nov. 20, 2020.
Prior Publication US 2022/0335992 A1, Oct. 20, 2022
Int. Cl. G11C 7/00 (2006.01); G11C 7/10 (2006.01); G11C 7/12 (2006.01); G11C 7/22 (2006.01)
CPC G11C 7/12 (2013.01) [G11C 7/1069 (2013.01); G11C 7/1096 (2013.01); G11C 7/222 (2013.01); G11C 2207/12 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A device, comprising:
a memory array having a plurality of bit cells arranged in rows and columns;
a plurality of word lines, each word line connected to a respective row of bit cells;
a word line decoder coupled with the plurality of word lines; and
a control signal generator coupled with a modulation circuit and the word line decoder, wherein the control signal generator is configured to produce a first control signal to the word line decoder for generating word line signals, and the control signal generator is configured to produce a second control signal to the modulation circuit in reference with a tracking wiring, a rising edge of the second control signal occurs before rising edges of the word line signals, a falling edge of the second control signal occurs after falling edges of the word line signals,
wherein the second control signal is maintained at a voltage level from a moment of a rising edge of a word line signal of the word line signals until a moment of a falling edge of the word line signal.