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Single Chip 50 Watt/8 Ohm Power Amplifier - Uses National Semiconductor LM3876
Power IC. Voltage gain is 27dB. Voltage gain is 27dB as shown, but this can be
changed by using a different value resistor for the feedback path (R3, currently 22k,
between pins 3 and 9). The inductor consists of 10 turns of 0.4mm enameled copper
wire, wound around the body of the 10 Ohm resistor. The insulation must be scraped off
each end and the wire is soldered to the ends of the resistor. (added 10/05) |
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Single Chip 50 Watt/8 Ohm Power Amplifier sound.ad - Uses LM3876 HiFi amplifier IC
from National Semiconductor (added 4/02) |
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Single Ended Class A2 Sv81110 Stereo Amp - (diagram added 6/03) |
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Single Stage Low-Noise IC Mic Preamp - AS018 Jenson Transformer Application Note
(app note 6/07) |
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Single Stage Mic Preamp with Two DC Servos - AS019 Jenson Transformer Application
Note (app note 6/07) |
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Small Amplifier Circuit - Uses many amplifier ICs, from feWatt-Watts to200-Watt
(added 4/02) |
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Small bench Amplifier ideal for testing audio stages in circuits - (electronic
circuit added 2/07) |
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Soft Start Circuit for Power Amps - Designed for (large) toroidal transformers,
limit the inrush current to a sensible value. (diagram added 6/03) |
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Spatial Distortion Reduction Headphone Amp - (diagram added 6/03) |
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Speaker Microphone - (schematic / circuit design added 9/02) |
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Stereo Jack Adds No Cost Power/Logic Control - 04/15/99 EDN-Design Ideas: [Note:
File contains multiple circuits. Scroll to find this one] Many battery-powered
devices use peripherals that require only two conductors to complete their interfaces.
You can use stereo phone jacks and monaural plugs to perform poweror logic-control
functions in a.....(design idea added 11/05) |
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Stereo Line Driver - Power Amp Stereo Line Driver, This preamplifier has a low
output impedance, and is designed to drive long cables, allowing you to listen to a
remote music source without having to buy expensive screened cables. The very low
output… (added 4/02) |
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Stereo Tube Amplifier (Aaron Cake) - The circuit is simple, yet is capable of
excellent performance. I designed it specifically for use as an amplifier for the
digital sound card in my computer. Audio input can be from any two-channel line level
device such as a television, CD player...(circuit added 7/02) |
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Stereovahvistin 2 x 220W RMS - This is a building plan for an audio amplifier
with2 x220-Watt output power. Text is in Finnish. (added 4/02) |
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Subwoofer Equaliser - The Linkwitz transform circuit is a hugely flexible way to
equalize the bottom end of a sealed loudspeaker enclosure. A speaker that is corrected
using this method is flat from below resonance to the upper limit of the selected
driver. The low frequency roll off point is determined by the parameters of the
transform circuit....(added 7/03) |
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Synchronous oscillator converts audio video to FM - 07/22/99 EDN-Design Ideas:
(design idea added 11/05) |
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TDA2030 8 Watt Amplifier - Although the TDA2030 can deliver 20 watts of output
power, I deliberately reduced the output power to about 8 watts to supply 10 watt
speakers. Input sensitivity is 200mV. Higher input levels naturally will give greater
output, but no distortion should be heard.... (schematic added 6/07) |
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Thermofan to Keep Your Amp Cool - (diagram added 6/03) |
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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 (1.7K @ 70F)
thermistor....(added 10/05) |
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Three Transistor Audio Amp 50 Milliwatt - Here is a little audio amplifier similar
to what you might find in a small transistor radio. (added 4/02) |
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Touch Switch (Aaron Cake) - A touch switch is a switch that is turned on and off
by touching a wire contact, instead of flicking a lever like a regular switch. Touch
switches have no mechanical parts to wear out, so they last a lot longer than regular
switches. Touch switches can be used in places where regular switches would not last,
such as wet or very dusty areas....(electronic design added 6/07) |
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TPA3001d1EVM Evaluation Module - The TPA3001D1 is a 20-W mono Class-D audio power
amplifier designed for 12V to 18V applications with a 4to 8-Ohm minimum speaker
impedance. The efficient Class-D operation reduces solution size and cost by
eliminating the need for heat sinks. In addition, integrated gain settings and surface
mount packaging also ....(added 3/05) |
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TPA3007d1 Evaluation Module - The TPA3001D1 is a 20-W mono Class-D audio power
amplifier designed for 12V to 18V applications with a 4to 8-Ohm minimum speaker
impedance. The efficient Class-D operation reduces solution size and cost by
eliminating the need for heat sinks..... (added 3/05) |
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Tube Amplifier Kit - The amplifier kit uses two 11MS8 tubes per channel. The two
DC blocking capacitors and the four coupling capacitors are metallized polyester,
while Samsung aluminum electrolytic capacitors are used to filter the solid-state
power supply. ….(design added 11/08) |
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Tube Amplifiers - (schematic / circuit design added 9/02) |
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Tube Microphone Preamp Generic Input Stage - AS020 Jenson Transformer Application
Note (app note 6/07) |
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Two JT-115K-E used in Symmetrical Mic Input Stage - AS047 Jenson Transformer
Application Note (app note 6/07) |
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Two Watt Amplifier - Low distortion amplifier using discrete components (added
5/02) |
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Voltage Controlled Amplifier - In truth this, like many (most) VCAs is really a
current controlled amplifier but there is really not too much difference since if you
want to turn a CCA into a VCA you simply feed the current input from a voltage via a
voltage to current converter (a.k.a. 'resistor')...(electronic circuit added 7/03) |
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Weighting Filter for Audio Measurements - For noise measurements. Ideal for use
with the AC Millivoltmeter above (circuit / schematic design added 6/06) |
