US 12,375,067 B2
Circuit and method for duty cycle adjustment
Tsung-Hsien Tsai, Taoyuan (TW); Chih-Hsien Chang, New Taipei (TW); and Ya-Tin Chang, Hsinchu (TW)
Assigned to TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD., Hsinchu (TW)
Filed by TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD., Hsinchu (TW)
Filed on Nov. 16, 2023, as Appl. No. 18/510,696.
Prior Publication US 2025/0167770 A1, May 22, 2025
Int. Cl. H03K 3/017 (2006.01); H03K 5/133 (2014.01); H03L 7/081 (2006.01)
CPC H03K 3/017 (2013.01) [H03K 5/133 (2013.01); H03L 7/0814 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A circuit for adjusting a periodic input signal, comprising:
a duty cycle calibration device, configured to generate a first signal and a second signal in response to the periodic input signal, wherein the first signal and the second signal have different phases;
a phase adjusting device, configured to receive the first signal and the second signal and generate a third signal by combining the first signal and the second signal based on a selection signal; and
a duty cycle measurement (DCM) device, configured to measure and adjust a duty cycle of the third signal so that the selection signal is adjusted to generate a periodic output signal, wherein a frequency of the periodic output signal is twice that of the periodic input signal.