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Article: Marathon of Simple Circuits.
- Article from:
- Poptronics
- Article date:
- August 1, 2000
- Author:
CopyrightCOPYRIGHT 2000 Poptronix, Inc. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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This month, we're going to sponsor a marathon of simple circuits that hopefully will be the catalyst needed to turn a stalled project into a completed device or to spark an interest in starting a new project. We'll start out by looking at three basic audio circuits and see where that leads us.
Broadband Audio Amplifier
Our first audio circuit (see Fig. 1) is a two-transistor broadband audio amplifier. The amplifier circuit has a voltage gain of about 60 in the boost position and 15 in the non-boost position. In both gain positions, the amplifier's frequency response is almost flat from 200 Hz to over 100 kHz. Transistor Q1 is connected as a ...
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... ... aperture terminals (VSAT), and for long-haul, point-to-point terrestrial communications. The device increases the maximum output power of the amplifiers within existing design platforms, and allows designers to use a single transistor for all satellite ...
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