Miscellaneous active electrical nonlinear devices – circuits – and – Specific input to output function – Absolute value
Patent
1996-05-14
1998-02-24
Nelms, David C.
Miscellaneous active electrical nonlinear devices, circuits, and
Specific input to output function
Absolute value
327 62, 327303, 327 65, 327 77, H02M 7217
Patent
active
057215073
ABSTRACT:
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).
REFERENCES:
patent: 3584234 (1971-06-01), Fredricsson
patent: 4038684 (1977-07-01), Miyamoto
patent: 5477171 (1995-12-01), Menegoli et al.
Fujii Tomohiro
Kudou Hiroshi
NEC Corporation
Nelms David C.
Tran Andrew Q.
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