High Frequency, High Precision CMOS Half-Wave Rectifier

In this paper, a high frequency and high precision CMOS half-wave rectifier circuit with positive and negative outputs is presented. The proposed circuit consists of a voltage-to-current converter, a precision current-mode rectifier with operating in class-AB, and two current-to-voltage converters. A voltage input signal is changed into a current signal by the voltage-to-current converter. The class-AB current mode rectifiers rectify these current signals, resulting in positive and negative half- wave current signals that are converted to positive and negative half-wave voltage signals by the current-to-voltage converters. The circuit exhibits low component counts, high frequency operation, good temperature stability and suitable of IC fabrication. The simulation results are used to verify the performance of the proposed circuit. Simulated rectifier performance with standard 0.5 m CMOS technology using !1.2V supply voltage shows the proposed half-wave rectifier circuit provides an operating frequency more than 250MHz and excellent temperature stability.