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Circuits Designed by Dave Johnson, P.E. : |
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PRECISION FULLWAVE
RECTIFIER
I have used this handy circuit many times.
It accurately converts an AC signal into pulsing DC, which can be
filtered to provide an average of the input voltage.
It works from millivolts to volts.
The circuit shown requires a stable +5v reference if a single power
supply is used.
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Links to electronic circuits, electronic schematics, designs
for engineers, hobbyists, students & inventors:
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Introduction to Rectifiers - MicroNote 301 from Microsem....[App
Note] |
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Introduction to Schottky Rectifiers - MicroNote 401 from
Microsem....[App Note] |
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Make A Bridge Rectifier From Diodes - Make your own single or
multi phase bridge rectifier from diodes…. [REUK - Renewable Energy UK
website] |
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Method provides self timing for synchronous rectifiers -
16-May-02 Issue of EDN Synchronous rectifiers are MOSFETs, driven in
such a way as to perform a rectifying function. They often take the place
of diodes in the output-rectification stage of switching power converters,
because of their lower on-state power loss. In power circuits,
synchronous.... [Design Idea by Giampaolo Carli, SAE Power Co,
Saint-Lazare, Quebec, PQ, Canada] |
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OpAmp Rectifier Signals Input State - 07/21/94 EDN-Design
Ideas....The op-amp rectifier in Fig 1 operates from a single supply and
provides a logic output and an LED that indicate the state of the.... EDN
is migrating links. This link is not verified. Search the "title" +
"EDN" for new link. |
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Optimizing the Ultra-Fast POWERplanar Rectifier Diode for Switching Power Supplies
- National Semiconductor Application Note....[App Note] |
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Precision Fullwave Rectifier - I have used this handy circuit many times.
It accurately converts an AC signal into pulsing DC, which can be filtered to
provide an average of the input voltage. It works from millivolts to volts.
The circuit shown requires a stable +5v reference if a single power supply is used.
…. [Designed by David A. Johnson] |
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Precision full-wave signal rectifier needs no diodes - 1-Sep-05 Issue of
EDN Single-supply design uses two op amps.... [Design Idea by José M Blanes
and José A Carrasco, University Miguel Hernández, Elche, Spain; Edited by Brad
Thompson and Fran Granville] |
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Precision Rectifier is Glitch Free to 1 MHz - 05/12/94 EDN-Design
Ideas....The manufacturer’s circuit for a precision, current-mode, full-wave
rectifier (Fig 1a]converts a voltage signal to a current, eliminating errors arising
from voltage drops across the rectifying diodes. However, just like op-amp-based
rectifiers, the circuit.... [Design Idea by Dan Stiurca, "Gh Asachi" Technical
University, Iasi, Romania] |
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Precision Rectifier Reduces Ripples - 03/03/97 EDN-Design Ideas....You can
use a lowpass filter to simultaneously increase a rectifier's speed and reduce or
maintain the ripple voltage. The input voltage of the precision rectifier in Figure
1a is 100 mV at a frequency of 50 Hz. The output with C1 equal to0 is a double
phase-rectified voltage of R2/R1.... EDN is migrating links. This link is not
verified. Search the "title" + "EDN" for new link. |
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Rectifier Reverse Switching Performance - MicroNote 302 from
Microsem....[App Note] |
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Rectifier tracks positive & negative peaks - 06/08/06 EDN-Design
Ideas....Versatile precision rectifier also delivers full-wave output.... EDN is
migrating links. This link is not verified. Search the "title" + EDN for new
link. |
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SCR Voltage Regulator - Though not as accurate as a linear or a
high-frequency switching regulator, an SCR voltage regulator wastes little power and
creates no RFI. Designed by Andrew R. Morris (added 09/05) |
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Silicon Controlled Rectifier Model Railroad Throttles & London Model Railroad Group
SCR Throttle - The following is a schematic drawing of a Silicon
Controlled Rectifier type throttle for use on larger scale model railroads. Three
versions of this throttle are shown on this page. They are not sophisticated designs
but work well and are tough and reliable. [from Rob Paisley's Model Train web site] |
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Step Down Rectifier Makes a Simple DC Power Supply - 04/09/98 EDN-Design
Feature A simple and useful nonisolated rectifier features voltage step-down
operation, acceptable Class A line-current harmonics, inherent short-circuit
protection, and, optionally, a regulated output....several circuits included, scroll
the find this one.... [Design Idea by Nathan O Sokal, Design Automation Inc, K Kit
Sum, Consultant, and David C Hamill, Surrey Space Centre] |
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Thermostat for 1KW Space Heater SCR controlled - Here is a simple
thermostat circuit that can be used to control a relay and supply power to a small
space heater through the relay contacts. The relay contacts should be rated above
the current requirements for the heater. Temperature changes are detected by a(added
6/06) |
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Three Phase Bridge Rectifier - Find out about three phase bridge
rectifiers…. [REUK - Renewable Energy UK website] |
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Two op amps provide averaged absolute value - 30-Oct-03 Issue of EDN
The circuit in Figure 1 is useful when you need amplitude demodulation or an
averaged absolute-value conversion. The circuit comprises two stages, the first of
which, IC1A, is a differential-output absolute-value converter. The second stage,
IC1B, is a traditional differential amplifier. The combination of the two stages
performs single-ended absolute-value conversion but only if R3>>R2.... [Design Idea
by Dobromir Dobrev, Jet Electronics, Sofia, Bulgaria] |
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Two OpAmps Make Fast Full Wave Rectifier - 03/14/96 EDN-Design
Ideas....The circuit in Figure 1 is a precision full-wave rectifier with the
following characteristics…. [Design Idea by Fernando Werlang, CPqD-Telebras,
Campinas, Brazil] |
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Rectifiers: #'s - H
I - Z |
