Simple audio booster circuit diagram
This small audio booster circuit has a maximum gain of around 22 dB (voltage gain). The frequency response of the amplifier is decided primarily by the value of just a few components, primarily C1 and R1. The values within the schematic design present a response of ±3.0 dB from about 120 Hz to higher than 20,000 Hz. In fact, the frequency response is ruler flat from about 170 Hz to more than 20,000 Hz; it is the low end that deviates from a flat frequency response.
This schematic diagram come from circuit: Small Audio Booster
Go to that page to read the explanation about above circuit design.
In the electrical sector, a schematic diagram is usually used to describe the design or model of equipment. Schematic diagrams are usually utilized for the maintenance and repair of electronic and electromechanical devices / units. Original schematics were made by hand, using standardized templates or pre-printed adhesive symbols, but nowadays Electrical CAD computer software is often used.
In electronic design automation, until the 1980s schematics were virtually the only formal representation for circuits. More lately, using the progress of computer system technology, other representations were introduced and specialized computer languages were developed, because with the explosive development of the complexity of electronic circuits, classic schematics are getting less practical. As an example, hardware description languages are indispensable for contemporary digital circuit design.