6M 100W Linear Amplifier

100 W output at 50 MHz is available from this circuit. Ul and Q2 form a T-R relay driver, switching the amplifie...

Agc System For Ca3028 If Amplifier

An MPF102 amplifier feeds IF signals to a 2N4126. A potentiometer in the MPF102 source acts as a gain co...

Tube Amplifier Isolates High Voltages

This amplifier can transfer dc-to 5-MHz signals across a potential difference of 25 000 V. This circu...

Increased Feedback-Stabilized Amplifier

The usual method for using a current-feedback amplifier to drive a capacitive load isolates the loa...

Wideband Test Amplifier

This single-stage amplifier (using a 2N2222 or 2N3904 general-purpose transistor) is useful for interfacing test in...

High-Power Car Audio Amplifier

NOTE: FOR BRIDGE CONFIGURATION: t install jumpers ju2 and ju4 2.remove j 1)3 3.remove rio 4replace ...

General-Purpose Preamp

This amplifier is useful for audio and video applications. Gain is set by Rf and the voltage gain of this amplifier ...

Microphone Preamp

This circuit is used to interface a high-impedance microphone to a radio transceiver that requires a low-impedance microp...

Low-Noise Audio Preamp

A low-noise LT1115 (Linear Technology, Inc.) op amp is coupled to a class-A buffer amplifier to produce a variable g...

Cd4049 Amplifier

When an inverter is biased with one resistor from its input to output in the range of 100 KOhmhm to 10 and is capacitor c...

Universal Audio Line Amplifier

A line amplifier is always a useful unit to have around, whether it is for matching a line signal or raising...

Electric Guitar Matching Amplifier

An electric guitar often has to be connected to a mixing panel, a tape deck or a portable studio. As far...

Simple Microphone Preamp

This preamp uses a small dynamic microphone coupled to the gate of Ql. R1 is a load resistor. Audio is taken out b...

Simple Op Amp Audio Amplifier

A CA3140 drives a complementary output stage Ql, Q2, and Q3. Output power depends on supply voltage and limit...

8W Audio Amplifier

This audio power amp (built around an LM383 8-W, audio power amplifier) can be used to boost an audio signal to a suffi...

General-Purpose 5W Audio Amplifier With Ac Power Supply

This general-purpose low-power (5 W) audio amplifier is suitable for driving a spe...

12V/20W Stereo Amplifier

This amplifier delivers 20 W per channel. Input sensitivity is about 300 mV into 47 kii. Notice that a bridged o...

Low-Distortion Amplifier/Compressor

Designers can build a 15-dB compressor with a miniature lamp and a current-feedback amplifier. The circ...

Voltage-Controlled Amplifier

The CA3080 can be used as a gain controlling device. The input signal is attenuated by R1/R2 so that a 20-mVpp...

Low-distortion-video-buffer

This buffer amplifier"s overall harmonic dis tortion is a low 0.01 % or less at 3-V rms output into a 500-fl load with no overall feedback. The LT1010CT offe...