Electrical musical instrument phase shift vibrato system专利检索-互调失真信号处理专利检索查询-专利查询网

Electrical musical instrument phase shift vibrato system

阅读：711发布：2021-06-24

专利汇可以提供Electrical musical instrument phase shift vibrato system专利检索，专利查询，专利分析的服务。并且A vibrato or similar system for musical instruments which has successive phase shift stages in which the degree of phase shift is variable depending upon an input variable modulating voltage at a vibrato frequency. Each of the phase shift stages makes use of a field effect transistor as a variable resistance element and includes a circuit feature which solves the problem of intermodulation distortion normally encountered in such circuits.，下面是Electrical musical instrument phase shift vibrato system专利的具体信息内容。

权利要求

1. In a phase shift vibrato system for an electrical music signal, a signal input, a signal output, a source of modulating variable voltage at a sub-audible rate, means providing one or more phase shift stages in series between said input and said output, each of said stages comprising an amplifier having an input and a pair of oppositely phased outputs, parallel branches connecting the oppositely phased outputs to a common output for the stage, one of said branches including a series capacitor, the other of said branches including a field effect transistor having a source, a drain and a gate, a connection from said amplifier to said field effect transistor source and a connection from said drain to the common output for the stage, a connection from said source of modualating voltage to said gate, a pair of identical series connected resistors connected between the transistor source and drain, and circuit means including a series capacitor connected from the common point between said resistors to said gate.

2. In a variable voltage controlled phase shift system for an electrical music signal, an amplifier having a signal input and a pair of oppositely phased outputs, a pair of circuits connecting the oppositely phased amplifier outputs to a common output, a field effect transistor having a source, a drain and a gate, one of said pair of circuits comprising a connection from said amplifier to said transistor source and a connection from said drain to said common output, the other of said pair of circuits comprising a connection from said amplifier through a capacitor to said common output, a source of modulating variable voltage, a connection from the modulating voltage source to said gate, circuit means connected across said transistor for obtaining the average of the instantaneous voltages on said source and drain and means including a series capacitor for applying said average of said voltages to said gate.

3. The system called for in claim 2 in which the circuit means for obtaiNing the average of the instantaneous voltages comprises a pair of equal value resistors in series connected between the transistor source and drain and a tap at the common point between said resistors.

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Electrical musical instrument phase shift vibrato system

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