Patent ID: 7424081
Filing Date: 2008-09-09
Classification: H03L,H04L

Abstract:
1. A semiconductor integrated circuit device, comprising a phase detect circuit including: a phase detector for comparing phases between a first signal and a second signal and outputting first or second control voltage in accordance with difference of phases; and a majority decision circuit for counting first and second control voltages output from said phase detector for a fixed period of time, respectively and outputting an UP signal when said first control voltage count is larger than said second control voltage count, a DOWN signal when said second control voltage count is larger than said first control voltage count, or a FIX signal when said first control voltage count is equal to said second control voltage count, wherein the majority decision circuit comprises; a first counter for counting the first control voltage; a second counter for counting the second control voltage; a first data latch register for latching count data given from said first counter; a second data latch register for latching count data given from said second counter; said first and second counters are asynchronous counters, said semiconductor integrated circuit device includes a delay circuit for generating clocks having a same delay time as said first and second counters, and clocks generated by said delay register circuit are used for latching count data of said first and second counters.