Patent ID: 9160521
Filing Date: 2015-10-13
Classification: H03L,H04L

Abstract:
1. A timing signal generation circuit comprising: a phase comparison circuit configured to detect a phase difference between an input signal and a recovery clock; a control voltage signal generation unit configured to generate two phase differential control voltage signals which are inverted for each predetermined angle and which change between a high level and a low level of the control voltage signals, based on the detected phase difference; a timing detection circuit configured to detect timing in which the control voltage signals are inverted, and generate quadrant information of the phase difference of the control voltage signals and an inverted timing signal; a synthesized phase selection circuit configured to select clocks of two phases which are used for phase interpolation for each predetermined angle, from clocks of a plurality of phases, and generate a phase control signal for synthesizing the selected clocks of two phases for the phase interpolation, based on the control voltage signals and the quadrant information; and a phase synthesis circuit configured to generate the recovery clock by synthesizing the selected clocks of two phases, based on the phase control signal.