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Amplifier Circuits: Operational Page 5a
Operational Amplifiers:
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Last Updated on:
Friday, March 23, 2012 04:35 PM |
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Links to electronic circuits,
electronic schematics, designs for engineers, hobbyists, students & inventors:
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Op amp increases potentiometer’s resolution 06/05/00 EDN-Design
Ideas key parameter of digitally controlled potentiometers
(DCPs] is the number of taps (n] programmable positions of the wiper.
This parameter establishes the resolution in programmable-voltage and
-current applications. A number of circuit....PDF has many circuits,
scroll to this one....[Chuck Wojslaw, Xicor Inc, Milpitas, CA, and P
Gareth Lloyd, Elab Ltd, Stoke-on-Trent, UK] EDN migrating links. This
link is not verified. Google the "title" EDN for new link.
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Op Amp Input Voff & Ibias - ....(spice design added 02/09)
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Op Amp Limiter - ....(spice design added 02/09) |
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Op amp linearizes attenuator control response - 25-Jul-02
Issue of EDN 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 control
voltage increases in the positive direction. The circuit in Figure 1
extends the range of applications for this versatile chip by providing
a simple.... [Design Idea by Mike Irwin, Shawville, PQ, Canada] |
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Op amp linearizes response of FET VCA - 5-Sep-02 Issue of
EDN 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. You frequently need to select individual FETs
because of wide spreads in FET characteristics.... [Design Idea by
Mike Irwin, Shawville, PQ, Canada] |
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Op Amp Macro-Models - ....(spice design added 02/09) |
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Op Amp Output Impedance Apex-AN10 - Apex App Note (added 08/08/08)
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Op Amp PID Controller - We've all heard about the wonders of the PID
controller, bringing a system's output, temperature, velocity, light, to its desired
set point quickly and accurately. But now, your boss says okay, design one for us.
Although there's a number of ways to do it, the circuit above nicely separates the
three terms....(spice design added 02/09) |
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Op Amp Provides On-The-Fly Adjustable Current Limit - DN298 Design
Notes (Linear Technology) (app note added 1/06) |
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Op Amp Radio - Here is a simple radio that is easy to build and inexpensive.
In fact, you probobly have all the parts you need in your junk box. You'll be suprised
at the great reception with this little set. The antenna can be a piece of wire or a
telescoping antenna....(electronic circuit added 7/03) |
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Op Amps Make JFET Circuits Repeatable - 05/24/01 EDN-Design Ideas
Because they use practically no bias current (a useful feature in itself), JFETs also
have practically no current noise. This feature means that you can use JFETs in
very-high-resistance circuits and obtain good noise…PDF has many circuits, scroll for
this one.... [Design Idea by Glen Brisebois, Linear Technology Corp, Milpitas, CA] |
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Op-amp Astable Timer - An astable timing circuit made from the ubiquitous
741 op-amp. [Andy Collison] |
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Opamp Based Power Amplifier - This is a contributed project, and has some
interest as a learning exercise (circuit added 6/07) |
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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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