US 11,757,432 B2
Device and method of correcting duty cycle
Xuan Zhang, Hangzhou (CN); Po Han Chen, Hangzhou (CN); Keng Lone Wong, Hangzhou (CN); and Alessandro Minzoni, Hangzhou (CN)
Assigned to AP Memory Technology (Hangzhou) Limited Co, Hangzhou (CN)
Filed by AP Memory Technology (Hangzhou) Limited Co, Hangzhou (CN)
Filed on Mar. 17, 2022, as Appl. No. 17/697,501.
Claims priority of application No. 202110295936.1 (CN), filed on Mar. 19, 2021.
Prior Publication US 2022/0302905 A1, Sep. 22, 2022
Int. Cl. H03K 3/017 (2006.01); H03K 5/01 (2006.01); G06F 1/08 (2006.01); H03K 19/20 (2006.01); H03K 5/00 (2006.01)
CPC H03K 3/017 (2013.01) [G06F 1/08 (2013.01); H03K 5/01 (2013.01); H03K 19/20 (2013.01); H03K 2005/00078 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A device of correcting duty cycle, comprising:
a duty cycle correcting circuit, generating a pair of phase-shifting clocks in accordance with a pair of complementary clocks, regenerating a regenerated clock in accordance with the pair of phase-shifting clocks, and comprising a coarse adjustment delaying unit, a fine adjustment delaying unit and a regenerating circuit in series connection sequentially, wherein:
the coarse adjustment delaying unit delays the pair of complementary clocks to generate a pair of first clocks having a first phase shift, the fine adjustment delaying unit delays the pair of first clocks to generate the pair of phase-shifting clocks having a second phase shift, and the regenerating circuit regenerates the regenerated clock in accordance with the pair of phase-shifting clocks;
a controller of the duty cycle correcting circuit, coupling to the duty cycle correcting circuit; and
a duty cycle detecting circuit, coupling to the duty cycle correcting circuit and the controller of the duty cycle correcting circuit, and generating a detecting output to the controller of the duty cycle correcting circuit in accordance with a current duty cycle of the regenerated clock;
wherein the controller of the duty cycle correcting circuit controls the duty cycle correcting circuit in accordance with the detecting output to adjust the pair of phase-shifting clocks.