Analog selector

Abstract

The invention provides a multiple-value generator circuit, namely, an analog selector. For the analog selector, a single input pin can generate three kinds of or more than three kinds of outputs, two input pins can generate 32 kinds of more than 32 kinds of outputs, and n input pins can generate 3n kinds of or more than 3n kinds of outputs. An analog signal of an external input of the circuit corresponds to one of parameters or options in the circuit after being quantized, encoded and subjected to option control, so that the function of controlling the parameters or options in the circuit is achieved by controlling and generating the analog signal outside the circuit.

Description

technical field [0001] The present invention relates to circuits for a single input analog signal to control parameters or options within the circuit. In particular, an analog signal input from the outside of the circuit corresponds to one of the multiple parameters or options inside the circuit through quantization, encoding and option control, so as to realize the control of parameters or options inside the circuit by controlling and generating analog signals outside the circuit effect etc. Background technique [0002] As we all know, the IIC interface is used to configure parameters and options in large-scale digital logic integrated circuits. For small-scale digital logic integrated circuits, this method is too complicated and occupies a relatively large chip area. Usually a logic input produces two types of "0" and "1" (2 1 ) output value, two inputs produce four kinds of "00", "01", "10" and "11" (2 2 ) output value, three inputs produce eight kinds of "000", "001"...

AI Technical Summary

Problems solved by technology

For example: in an integrated circuit chip, the parameters in the chip are set or programmed, and the general method is to use the above-mentioned binary logic circuit or a special interface (such as SPI, I 2 C, etc.) circuits to complete; but in some special cases, it is also hoped that one input can generate multiple outputs, such as: in an integrated circuit chip with a limited number of pins, simply setting or setting the parameters in the chip or For programming, it is not feasible to use the above-mentioned general method, because the binary logic circuit can only produce two kinds of outputs for each input pin, so that only two kinds of parameters can be set, the number is too limited, and a special interface (such as SPI, I 2 C, etc.) circuits obviously require more pins and more hardware overhead. At this time, one input pin is required to generate multiple outputs, for example, one input pin can generate 3 or more outputs

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