Single-board type command amplification board

Abstract

The invention relates to a single-board type command amplification board. A peripheral microprocessor, an audio power amplifier, a signal tone generator, a busy tone and mute detection circuit, an off-hook and on-hook detection circuit, a constant current source feed circuit, a ringing detection circuit, a communication equipment user port, a telephone set port, a broadcasting speaker port and a power supply circuit are arranged on a printed circuit board. The single-board type command amplification board is also additionally provided with an audio power amplifier processor, an amplitude limiting circuit, an audio power amplifier protection and line protection circuit, a power-off switching circuit, a two / four-wire switching and called mode selecting circuit, a microphone interface circuit and a microphone interface and double audio detection circuit. The single-board type command amplification board has reasonable structure, and not only can be matched with communication equipment which meets the national standard, but also can be used for independently forming a novel conference terminal. The multifunctional selectivity and the stability and the reliability of the operation of the single-board type command amplification board are obviously improved.

Description

Technical field [0001] The invention belongs to the technical field of communication equipment, and particularly relates to a functional board in the communication equipment, and specifically refers to a single-board type command amplifier board. Background technique [0002] In the production process of the enterprise, the dispatching operation instructions are sent to each production position by the dispatching commander through the communication equipment, especially for the noisy and empty production environment positions. The instructions are delivered to the scene in time and accurately to ensure safe production. The solution for the noisy and empty production environment posts on the scene generally adopts the form of broadcast call configuration on the post. In December 2008 ≤ Journal of Tianjin Polytechnic University ≥ Volume 27, Issue 6, Pages 65, 66, 67 Guo Cuijuan, etc. ≤ Design of AT89C2051-based Amplifier Telephone ≥ article, the author designed the use of single-ch...

AI Technical Summary

Problems solved by technology

It is mainly an accessory in the program-controlled automatic command telephone device. Due to the harsh environment of the production site, the command user board works normally, and the real reliability, stability and multi-function selection have not been reflected.

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