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本文提出一种利用单片机控制的驻波比数字显示系统 ,介绍了该系统的设计原理和方法 ,给出了采用程控增益放大器控制模拟信号电平的放大、高精度 A/D转换、数字显示单元的电路框图及与 80 31单片机的接口电路
In this paper, we propose a digital display system for standing-wave ratio controlled by single-chip microcomputer. The design principle and method of this system are introduced. Amplified and high-precision A / D conversion using programmable gain amplifier to control analog signal level is presented. The digital display unit Circuit diagram and the interface circuit with the 8031 microcontroller