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一、简介 近年来,随着微电子和数字技术的迅速发展,录像机、VCD、多媒体电脑等高新技术产品日新月异,不断涌现。因此,AV音视频技术也得到了广泛的应用和发展。但是老式电视机绝大多数没有安装AV接口电路和输入输出端子,使得用户在使用音视频节目源设备时很不方便。本文提供了一种简单实用的AV音视频接口电路,采用一块独立的印刷电路板,安装在电视机
I. Introduction In recent years, with the rapid development of microelectronics and digital technology, high-tech products such as video recorders, VCDs and multimedia computers are constantly emerging. Therefore, AV audio and video technology has also been widely used and developed. However, most of the old-fashioned TV sets do not have an AV interface circuit and input / output terminals, which makes the user inconvenient when using the audio-video source device. This article provides a simple and practical AV audio and video interface circuit, using a separate printed circuit board, mounted on the TV