Mini Amplifier Using Lm1895N Circuit

With 3-V to 9-V supplies, this amplifier can provide from 100-mW to 1-W output into a 4 and bandwidth is approximately 20 kHz @ 3 dB. This circuit is useful f...

Headphone Amplifier Circuit

Built arouud Precision Monolithics Inc. OP-50 op amps, this amplifier will drive 100- to 14 headphone, is flat within 0.4 dB from 10 Hz to 20 kHz, and has a TH...

Fast High-Voltage Linear Power Amp Circuit

An Apex PB50 Booster Amplifier, plus an IC op amp, can be used in a high-voltage op amp that converts a small analog signal to a 180-V p-p signal.Apex Microtec...

Audio Power Amplifier Circuit

The circuit, built around an LM741 op amp configured as an inverting amplifier, is used to drive complementary transistors (Ql and Q2). The op amp`s feedback l...

Subwoofer Amplifier Circuit

Designed to feed a low-frequency subwoofer speaker system, the amplifier is capable of up to 100 W into an 8- load. The OPA541BM op amp requires heatsinking an...

Mosfet Power Amplifier Circuit

Two complementary MOSFETs are used to deliver 20 W into 8 . A TL071 op amp is used as an input amplifier. The MOSFETs should be heatsinked with a heatsink of b...

20W Stereo Amplifier Circuit

The 20-W + 20-W stereo amp consists of two complete, separate 20-W RMS bridge-type amplifiers. The input signal source is brought into the amplifier through th...

Audio To Uhf Preamp Circuit

The Signetics NE5204 or NE5205 can be used in this AF to 350-MHz (-30 dB) preamp. If 600 MHz @ 3 dB is needed, use the NE5205. The noise figure is 4.8 dB at 75...

Fet Amplifier With Offset Gate Bias Circuit

In this amplifier circuit, the gate of the MPF 102 is biased with an external voltage. ...

General-Purpose Jfet Preamp Circuit

This JFET preamplifier has a gain of about 20 dB and a bandwidth of over 100 kHz....

Jfet Amp With Current Source Biasing Circuit

A current source (MPF102) in the source lead of bipolar transistor 2N3906 permits accurate control...

Electret Mike Preamp Circuit

This circuit is suitable for using an electret microphone for many applications. A 1.5-V battery is used. CI and R3provide treble boost/bass cut;...

Unity-Gain Noninverting Amplifier Circuit

Biasing methods for an N-channel MOSFET to form a unity-gain noninverting amplifier...

Noninverting Ac Amplifier Circuit

A general-purpose noninverting ac amplifier for audio of other low-frequency applications is shown. Design equations are in the figure....

Gain-Controlled Amplifier

This single-chip circuit adjusts its audio gain according to the ambient noise picked up by the microphone. When ...

Jfet Wideband Amplifier

Using an MPF102 JFET, this circuit has a 50- input impedance. Load impedance should be about 470 . A 3:1 matching t...

Mosfet Wideband Amplifier

For high-impedance (7 500 ) applications, this amplifier will provide a voltage gain of approximately -gm/ where ...

Wideband Amplifier

This wideband amplifier uses a MAR1 IC, which is a gain block. The device is manufactured by Mini-Circuits Lab and offer...

Uhf Tv-Line Amplifier

This circuit offers 10- to 15-dB gain from 400 to 850 MHz and is therefore eminently suitable for situations where th...

10 To 15W Atv Linear Amplifier

This amplifier is useful for applications where a 10- to 15-W peak-envelope-power (PEP) signal is needed i...