Phase detectors play an essential role in CDR circuits to recover clock and data. In this paper, an Operational Trans-Resistance Amplifier (OTRA) based phase detector circuit has been proposed. The proposed circuit is simple to realize and consists of two OTRA based comparators, a CMOS XOR circuit and an RC integrator. SPICE simulations of the proposed circuit using 0.35 mu m CMOS process parameters have been given to verify the theoretical analysis.