Patent ID: 9651591
Date: 2017-05-16
CPC Classifications: G01R,H03D,H03K

Claim:
1. A method of determining an input phase differential between two input signals, comprising, providing a phase detector having pairs of transistors and having a first impedance (R setting the first signal (Iout_left) in the first branch as a first sum of a common mode output signal (Icm) and a differential mode output signal (Idm), setting the second signal (Iout_right) in the second branch as a second sum of the common mode output signal (Icm) minus the differential mode output signal (Idm), and determining an input phase differential (Δφ) by using a ratio between the differential mode output signal (Idm) and the common mode output signal (Icm), and adjusting a relationship between the first impedance (R determining the input phase differential (Δφ) when the differential mode output voltage (Vdm) is zero.