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Opamp Basics - The op-amp is basically a differential amplifier having a large
voltage gain, very high input impedance and low output impedance. The op-amp has a
"inverting" or (-) input and "noninverting" or (+) input and a single output. The
op-amp is usually powered by a dual polarity power supply in the range of +/- 5 volts
to +/- 15 volts. A simple dual polarity power ..... (circuit added 7/02) |
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Opamp Booster Designs - National Semiconductor Application Note 09-Apr-1996 (app
note added 4/02) |
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OpAmp can source or sink current - 03/02/06 EDN-Design Ideas: Bipolar
current source beats familiar Howland-current pump.....(design idea added 10/06) |
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Opamp Circuit Collection - National Semiconductor Application Note 04-Nov-1995
(app note added 4/02) |
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Opamp Design & Test Board - Quickly assemble an opamp circuit for testing.
Very easy and intuitive to use (electronic schematic / circuit added 4/02) |
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OpAmp Doubles as Instrumentation Amp - 09/15/94 EDN-Design Ideas: The
circuit in Fig 1 shows an ordinary, off-the-shelf, general-purpose op amp configured
as an instrumentation amplifier. Such a configuration yields an instrumentation
amplifier having higher bandwidth than currently available dedicated
instrumentation..../.....(design idea added 4/02) |
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OpAmp Improves Power Supply's Regulation - 06/06/96 EDN-Design Ideas: A
typical power supply has a voltage-regulation specification of 2 to 3% for all
conditions, including initial setting, line, load, and temperature. You can improve
regulation if the power-supply has remote-sensing capability, however.....(design idea
added 5/03) |
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OpAmp Increases Potentiometer's Resolution - 06/05/00 EDN-Design
Ideas:.....(design idea added 11/05) |
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Opamp Integrator - The integrator basically works like this: whatever current I
you get flowing in R1, gets integrated across capacitor C1. The output voltage Vo is
simply the voltage across C1. One great application of the integrator is generating a
ramp voltage. You can do this by placing a fixed voltage....(electronic schematic
design added 02/05) |
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OpAmp Linearizes Attenuator Control Response - 07/25/02 EDN-Design Ideas:
Professional-audio equipment commonly uses Analog Devices'
(www.analog.com)high-performance, quad-voltage-controlled SSM2164 attenuator. The
control response is -30 dB/V, with 0V producing unity gain. Attenuation increases as
the applied.....(design idea added 03/03/03) |
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OpAmp Linearizes Response of FET Vca - 09/05/02 EDN-Design Ideas: FETs find
common use in VCAs (voltage-controlled amplifiers)and attenuators, in which the FET
serves as a variable resistance. A control voltage applied to the gate sets the
channel resistance and overall circuit gain.....(design idea added 03/03/03) |
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OpAmp Makes Precise 9 Volt Battery Splitter - 07/17/97 EDN-Design Ideas:
-Alkaline 9V batteries are ideal for many portable, handheld applications, this
circuit generates a bipolar supply of5V and 2.3 to 4V using a precision5V reference
and one op amp as a supply splitter.....(design idea added 03/03/03) |
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OpAmp Oscillators Simplify RF Designs - 10/10/96 EDN-Design Ideas: (design
idea added 03/03/03) |
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Opamp Radio (Aaron Cake) - (electronic schematic / circuit added 04/03/02) |
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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 input voltage. The input-state indications are
handy for calibration. Because the circuit operates from a single supply, the 2.5V
reference determines the level around which the circuit rectifies input
waveforms.....(design idea added 03/03/03) |
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Op-Amps Basic Circuits for the beginner. - The 7 Basic Circuit Configurations for
op-amps ….(electronic schematic added 12/08) |
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OpAmps Make JFET Circuits Repeatable - 05/24/01 EDN-Design Ideas: (design idea
added 8/03) |
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Operational Amplifier AC Specifications & Applications - Microchip Application
Note Published 3-Apr-01 (app note added 2/06) |
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Operational Amplifier Selection Guide for Optimum Noise Performance #2 - DN3
Design Notes (Linear Technology) (app note added 1/06) |
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Operational Amplifier Topologies & DC Specifications - Microchip Application Note
Published 3-Apr-01 (app note added 2/06) |
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Operational Integrators - AN-357 Analog Devices Application Notes (app note
added 6/06) |
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Optical Magnetic Projection Booth System - (diagram added 6/03) |