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Amplifier Circuits: Operational Page 6
Operational Amplifiers:
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Last Updated on:
Monday, October 03, 2011 06:07 PM |
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Links to electronic circuits,
electronic schematics, designs for engineers, hobbyists, students & inventors:
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Party Line Intercom - (diagram added 6/03) |
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P-channel power-MOSFET driver uses unity-gain op amp - 21-Jan-10
Issue of EDN Drive a power MOSFET to 100V dc with this
signal-conditioning circuit.... [Design Idea by Suded Emmanuel,
Emmanuel's Controls, Auckland, NZ] |
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Phonograph Disc Playback PreAmplifier - (diagram added 6/03)
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Phonograph Disc Record Amplifier - (diagram added 6/03)
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Photodiode amplifier exhibits one third the output noise of
conventional transimpedance amp - 26-Apr-07 Issue of EDN Bumping
the op amp's gain of a photodiode transimpedance amplifier by a factor
of 10 and then dividing the output of a transistor gain stage by a
factor of 10 achieves lower output noise.... [Design Idea by Glen
Brisebois, Linear Technology Corp, Milpitas, CA] |
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Piecewise Linear Amplifier Eschews Diodes - 10/12/95 EDN-Design
Ideas A common implementation of a piecewise linear amplifier uses
diodes in the feedback loop of an op amp. As the diodes become
forward-biased, they effectively switch in resistors that alter the
closed-loop gain of the amplifier. This implementation has two
disadvantages. First, the diodes' shunt capacitance leads to poor
high-frequency performance. Second,.... [Design Idea by Brian
Harrington, Analog Devices, Wilmington, MA] |
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Portable Mixer for Nagra Recorder - (diagram added 6/03) |
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Potentiometer Autonulls OpAmp - 10/22/98 EDN-Design Ideas Op-amp applications
that need the highest possible dc accuracy are generally best served by CMOS
chopper-stabilized amplifiers, such as the LTC1050. But high-speed, low-noise
applications may require high-performance rockets, such as the 700-MHz LT1226. So what
to do.... [Design Idea by Stephen Woodward, University Of North Carolina, Chapel Hill,
NC] |
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Power Amplifier has Transient Rail to Rail Swing - 09/29/94 EDN-Design Ideas Has
transient rail-to-rail swing special common-drain MOSFET-based power op amp
circuit....[Design Idea added 6/06] EDN migrating links. This link is not verified.
Google the "title" EDN for new link. |
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Precision level shifter has excellent CMRR - 15-Apr-04 Issue of EDN Most
designers make level shifters with op amps and 1%-tolerance discrete resistors.
Discrete-resistor mismatching limits the op amp's CMMR (common-mode rejection ratio]
to 40 dB, so you cannot use op amps in circuits that require high CMRR. Differential
amplifiers contain precision matched internal resistors, so ICs such as the INA133 can
readily achieve CMRRs of approximately 90 dB.... [Design Idea by Ronald Mancini, Texas
Instruments, Bushnell, FL] |
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Predicting Op Amp Slew Rate Limited Response - National Semiconductor Application
Note (app note added 2/06) |
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Program
an op-amp gain block with a limited-adjustability, monolithic, solid-state resistor
- 21-Aug-08 Issue of EDN An op-amp gain block allows a solid-state trimming
potentiometer with limited adjustability to trim over the complete input range....
[Design Idea by W Stephen Woodward, Chapel Hill, NC] |
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Program designs single supply OpAmp circuits - 10/26/95 EDN-Design Ideas
Mathematically, there is no difference between single- and dual-supply op-amp designs,
except for the signal reference. Dual-supply designs inherently reference signals to
ground. However, you must use biasing to reference signals to ground in a
single-supply design, because the signals are inherently referenced to VCC/2. This
requirement for external bias schemes complicates the design procedure. The Basic
program, which you can download from…. [Design Idea by Ronald Mancini and Dave Culver,
Harris Semiconductor, Melbourne, FL] |
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Pushing Low Quiescent Power Op Amps to Greater Than 55dbm 2-Tone Intercept -
National Semiconductor Application Note (app note added 2/06) |
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PWM Circuit uses One OpAmp - 07/06/00 EDN-Design Ideas circuit delivers a
rectangular signal with duty cycle varying between0 and100% in response to an input
signal varying from0 to5V dc....[Design Idea added 5/03] EDN migrating links. This
link is not verified. Google the "title" + EDN for new link. |
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