High-precision analog multiplier-divider

Abstract

The invention discloses a high-precision analog multiplier-divider, and belongs to the technical field of analog chip design. Corresponding analog multiplier and divider implementation circuits are designed on the basis of an NPN-type triode and a PNP-type triode respectively, a pouring point of current at the triodes is redesigned, and a control module is introduced to perform current loop control, so that the voltage of the collector of the triode is kept stable when input current flows into the collector of the triode; and it is ensured that the first input current, the second input current, the third input current and the output current can be completely and uniquely input from the collectors of the four triodes respectively, so that the problem that the precision is limited due to existence and matching of base region currents in a traditional analog multiplier-divider is solved, and high precision is achieved. Compared with a traditional multiplying and dividing device circuit, the chip design area and the circuit hardware expenditure are greatly reduced.

Description

technical field [0001] The invention belongs to the technical field of analog chip design and relates to a high-precision analog multiplication and division device. Background technique [0002] Although the digital multiplier has high precision, because the front-end signals are generally analog quantities, the front-end analog-to-digital converter ADC is required to increase the system overhead, and the conversion accuracy and power consumption also need to be compromised. In addition, the conversion delay itself is also some The system is not acceptable. Commonly used analog multipliers / dividers / multipliers / dividers do some analog signal processing, such as system power detection (V x I), square law generation circuits (X 2 ). For increasingly high-precision system requirements, when designing a high-precision multiplier and divider suitable for a wide range of inputs (such as: 100 times the input range, 0.5% system accuracy), some parasitic effects of the device become...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the disadvantages of traditional analog multiplier and divider that the circuit hardware overhead is large and the accuracy is difficult to improve due to the limitation of matching, the present invention proposes an analog multiplier and divider that improves the accuracy under wide-range input by improving the non-ideal characteristics of key components , compared with the traditional analog multiplier and divider, the circuit hardware overhead is less and the precision is higher

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