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CD7668CP是收录机用双前置放大集成电路。内含前置放大器(Pre)和录音放大器(Rec),具有ALC和静噪等功能。相比其他类似的双前置放大器LA3210、LA3220等功能更加齐全,后二种电路都没带录音放大器,同时又需外接ALC整流电路,因此CD7668CP所组成的录放电路更加简洁,在收录机中应用广泛。但CD7668在双卡录音机电路的应用中尚存在一些问题,如何解决这些问题,笔者在实际工作中摸索出一些方法,特别是在CD7668CP在双卡录音机电路中的应用和CD7668CP脚功能开发等方面有一些肤浅经验,现供大家参考,意在抛砖引玉。
CD7668CP is a tape recorder with dual preamplifier integrated circuits. Includes preamp (Pre) and recording amplifier (Rec), with ALC and mute and other functions. Compared with other similar dual preamplifier LA3210, LA3220 and other functions more complete, the latter two circuits did not bring a recording amplifier, but also an external ALC rectifier circuit, CD7668CP formed by the recording circuit more concise, widely used in tape recorders . However, CD7668 dual-card recorder circuit in the application of some problems still exist, how to solve these problems, the author worked out some ways in the actual work, especially in CD7668CP dual card recorder circuit applications and CD7668CP foot function development and so on Some superficial experience is for your reference, intended to start a discussion.