Tag Archives: Amplifiers

USB Powered Audio Power Amplifier

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This circuit of multimedia speakers for PCs has single-chip-based design, low-voltage power supply, compatibility with USB power, easy heat-sinking, low cost, high flexibility and wide temperature tolerance. At the heart of the circuit is IC TDA2822M. This IC is, in fact, mono-lithic type in 8-lead mini DIP package. It is… Read more »

VHF UHF Low-Noise Amplifiers using MAX2664 MAX2665

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A very simple VHF UHF Low-Noise amplifiers circuit can be designed using the MAX2664 and MAX2665 ultra-compact LNAs for VHF UHF applications.These devices incorporate a broadband LNA with an integrated bypass switch. The MAX2664 covers the UHF frequency range from 470MHz to 860MHz, and the MAX2665 covers the VHF frequency… Read more »

Balanced Microphone Amplifier

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We published a design for a stereo microphone preamplifier with balanced inputs and a phantom power supply. The heart of this circuit was a special Analog Devices IC, the SSM2017. Unfortunately, this IC has been discontinued. In its place, the company recommends using the pin-compatible AMP02 from its current product… Read more »

11W Stereo/22W Mono Power Amp Using TDA1519C

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Integrated AF power amps have seen great improvements in recent years offering improved power and easier use. The TDA1519C from Philips contains two power amplifiers providing 11 W per channel stereo or 22 W mono when the two channels are connected in a bridge configuration. The special in-line SIL9P package… Read more »

6V6 6J5 Class A Vacuum Tube (Valve) Amplifier Circuit

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Single Ended Class A 6V6 6J5 Valve (Vacuum Tube) Amplifier Circuit This is my first successful vacuum tube project.  The output of this small amplifier in which a 6V6GT output pentode is connected as triode is about 4.5 watts. This project involves a single ended audio amplifier, which consists of a… Read more »