JPS6448615U

JPS6448615U -

Info

Publication number: JPS6448615U
Application number: JP14421487U
Authority: JP
Priority date: 1987-09-21
Filing date: 1987-09-21
Publication date: 1989-03-27

Description

[Brief explanation of the drawing]

第１図はこの考案の一実施例を示す図、第２図
は従来のＲ／Ｄ変換装置を示す図である。図において、２はアナログ・デイジタル変換器
、４は余弦乗算器、５は正弦乗算器、６は引き算
器、７は乗算器、８は加算器、９はレジスタ、１
１は符号判定器、１２は位相検波器、１３は電圧
制御発信器、１４は可逆カウンタである。なお、
各図中同一符号は同一又は相当部分を示す。 FIG. 1 is a diagram showing an embodiment of this invention, and FIG. 2 is a diagram showing a conventional R/D conversion device. In the figure, 2 is an analog-digital converter, 4 is a cosine multiplier, 5 is a sine multiplier, 6 is a subtracter, 7 is a multiplier, 8 is an adder, 9 is a register, 1
1 is a sign determiner, 12 is a phase detector, 13 is a voltage controlled oscillator, and 14 is a reversible counter. In addition,
The same reference numerals in each figure indicate the same or corresponding parts.

Claims

[Scope of utility model registration request]

A first analog-to-digital converter inputs a sine wave signal of one of the two-phase resolver signals at the input end and converts it into a digital signal, and a cosine wave signal of one of the two-phase resolver signals is input to the input end. a second analog-to-digital converter that receives the input signal and converts it into a digital signal; a cosine multiplier that receives the two signals and multiplies them by the cosine values of the first input signal and the second input signal; a sine multiplier that inputs and multiplies the sine values of the first and second input signals, a subtracter that inputs two signals and subtracts the two signals, and a subtracter that inputs two signals and subtracts the two signals. A multiplier that multiplies signals, an adder that inputs two signals and adds the two signals, and a register that inputs two signals and temporarily holds a second input signal using the first input signal. and a resolver-digital converter comprising a sign determiner for determining the sign of an input signal, the output signal of the first analog-to-digital converter is input to a first input terminal, and the output signal of the first analog-to-digital converter is input to a second input terminal. input the signal of the register into
a cosine multiplier that multiplies the value of the cosine of the angle at the second input end by the signal at the first input end; Input the signal of the register into the second input terminal, and set the value of the sine of the angle at the second input terminal to the first input terminal.
a sine multiplier that multiplies the signal at the input end of the sine multiplier, the output signal of the cosine multiplier is input to the first input end of the two input ends, and the output signal of the sine multiplier is input to the second input end. a subtracter that subtracts two signals; a sign determiner that inputs a reference signal to an input terminal and determines its sign; and an output signal of the subtracter that inputs the output signal of the subtracter to a first input terminal of the two input terminals. , a multiplier that inputs the output signal of the sign determiner to a second input terminal and multiplies the two signals; and a multiplier that inputs the output signal of the register to a first input terminal of the two input terminals, and a second an adder that inputs the output signal of the multiplier to the input terminal of the multiplier and adds the two signals; a clock signal is input to the first input terminal of the two input terminals;
a register that inputs the output signal of the adder to the input terminal of the register and temporarily stores the signal given to the second input terminal with the signal given to the first input terminal.・Digital conversion device.