Young & Thompson
Full-wave rectifying circuit having only one differential pair circuit with a function for combining a pair of half-wave rectified currents into a full-wave rectified current
 In a full-wave rectifying circuit comprising a differential amplifier (20) differentially amplifies an input alternating current signal (V.sub.IN) to produce first and second amplified output voltages (V.sub.O1, V.sub.O2) and a voltage reference circuit (30) for generating a reference voltage (V.sub.REF), a differential pair circuit (40) carries out half-wave rectification on the first and the second amplified output voltages on the basis of the reference voltage to obtain first and second half-wave rectified currents (I.sub.C3, I.sub.C4). The differential pair circuit (40) includes a combining part (44) for combining the first and the second half-wave rectified currents into a full-wave rectified current (I.sub.RO). The full-wave rectifying circuit may further comprise a current/voltage converting section (50) for converting the full-wave rectified current into a full-wave rectified voltage (V.sub.RO). 
NEC Corporation
H
H03D
inventional
Hiroshi Tomohiro
Kudou Fujii