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Amplifier Circuits: Hi Impedance
Page 2
Amplifier -- Main Page
Last Updated on:
Monday, October 03, 2011 06:07 PM |
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Circuits Designed by Dave
Johnson, P.E. : |
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Links to electronic circuits,
electronic schematics, designs for engineers, hobbyists, students & inventors:
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High-impedance FET probe extends RF spectrum analyzer's usable range -
21-Jul-05 Issue of EDN Op amp and careful design/construction build
high-impedance RF probe.... [Design Idea by Steve Hageman, Windsor, CA;
Edited by Brad Thompson and Fran Granville] |
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High-impedance voltmeter - An ideal voltmeter has infinite input
impedance, meaning that it draws zero current from the circuit under test.
This way, there will be no "impact" on the circuit as the voltage is being
measured. The more current a voltmeter draws from the circuit under test,
the more the measured voltage will "sag" under the loading effect of the
meter, like a tire-pressure gauge....(schematic added 6/07) |
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High-voltage Amplifier Drives piezo tubes - 7-Dec-04 Issue of
EDN Piezoelectric tubular positioners that drive manipulators in
scanning tunneling microscopes require high-voltage, low-current drive
circuits. The circuit in Figure 1 can drive high-resistance,
low-capacitance piezoelectric loads at a -3-dB bandwidth of 6 kHz. It
offers a low-cost alternative to commercial drivers....PDF has several
circuits, please scroll to find this one.... [Design Idea by Bipin Duggal,
Netaji Subhas Institute of Technology, New Delhi, India] |
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Impedance transformer flags failed fuse - 17-Dec-04 Issue of EDN
Figure 1depicts a circuit that detects the opening of a miniature circuit breaker or
high-rupture-capability fuse in a high-reliability telecommunications power supply.
The circuit generates an alarm when a failure changes the impedance of an
electromagnetic sensor. Traditional fault-detection circuits sense the voltage
difference developed across an open fuse, leakage current flowing through.... [Design
Idea by Kevin Ackerley, Future Electronics, Vancouver, BC, Canada] |
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Line Driver Economically Synthesizes Impedance - 01/06/94 Issue of EDN-Design
Ideas The line-driver circuit in Fig 1 uses a second op amp to synthesize the
output impedance. The conventional line-driver circuit employs a single op amp having
a resistor whose resistance is equal to the desired impedance in series with the op
amp's.... [Design Idea by Victor Koren, Orckit Communication Ltd, Ramat-Gan, Israel] |
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Low Offset Summing Amplifier - Circuit Ideas for Designers Application Notes
Advanced Linear Devices, Inc. (app note added 63/06) |
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Low Voltage High Input Impedance Precision DC Summing Amplifier - Circuit
Ideas for Designers Application Notes Advanced Linear Devices, Inc. (app note
added 6/06) |
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Measuring Characteristic Impedance of Short Rambus Motherboard Traces & Small-Outline
RIMMs - Agilent Application Note (added 6/06) |
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Op Amp Output Impedance Apex-AN10 - Apex App Note (added 08/08/08)
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Variable Amplifier Impedance (Andy Collison) - This is a circuit where a
microphone and preamp circuit (voice circuit) have priority over any other audio
signal. You can think of this as a one way intercom, if the main amplifier is used for
listening to music, then when the push to talk switch is pressed, the amplifier is
switched to the voice signal....(added 4/02) |
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Hi Impedance:
#'s - E F - Z |
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