JPH0161613U

JPH0161613U -

Info

Publication number: JPH0161613U
Application number: JP15715387U
Authority: JP
Priority date: 1987-10-14
Filing date: 1987-10-14
Publication date: 1989-04-19

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１は象限選択回路、２は余弦乗算器
、３は正弦乗算器、４は引き算器、５はアナログ
・デイジタル変換器、６は符号反転器、７は加算
器、８はレジスタ、９は符号判定器、１０は位相
検波器、１１は電圧制御発振器、１２は可逆カウ
ンタ、１３は選択器である。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, 1 is a quadrant selection circuit, 2 is a cosine multiplier, 3 is a sine multiplier, 4 is a subtracter, 5 is an analog-to-digital converter, 6 is a sign inverter, 7 is an adder, 8 is a register, and 9 is a 10 is a phase detector, 11 is a voltage controlled oscillator, 12 is a reversible counter, and 13 is a selector. Note that the same reference numerals in each figure indicate the same or equivalent parts.

Claims

[Scope of utility model registration request]

A sine multiplier that inputs an analog signal and a digital angle signal and multiplies the analog signal by the sine value of the digital angle; and a sine multiplier that inputs an analog signal and a digital angle signal and multiplies the digital angle cosine value by the analog signal. A cosine multiplier that multiplies a signal, a subtracter that subtracts two signals, an analog-to-digital converter that inputs an analog signal and converts it to a digital signal, and a code that inputs a digital signal and inverts its sign. An inverter, a selector that inputs two digital signals and selects and outputs one of them, an adder that adds the two signals, a register that temporarily holds the digital value, and an analog signal that inputs and determines its sign. In a tracking type resolver-digital converter equipped with a sign determiner, one sine wave signal of the resolver signal is inputted to the first input terminal, and the digital signal of the register is inputted to the second input terminal. A cosine multiplier that multiplies a sine wave signal by the value of the cosine of the angle of the signal, a cosine wave signal of one of the resolver signals is input to a first input terminal, and a digital signal of the register is input to a second input terminal. a sine multiplier that inputs the value of the sine of the angle of the digital signal and multiplies the cosine wave signal; a sine multiplier that inputs the output of the cosine multiplier to a first input terminal, and inputs the output of the cosine multiplier to a second input terminal; a subtracter that inputs the output of the subtracter and subtracts two signals; an analog-to-digital converter that inputs the output of the subtracter to the input terminal and converts it into a digital signal; A sign determiner for determining the sign, and the analog signal at the input end.
A sign inverter that inputs the output of a digital converter and inverts its sign is connected to a first input terminal of which the output of the analog-to-digital converter is input, and a second input terminal of which the output of the sign inverter is input. , the output of the sign determiner is input to the third input terminal, and the signal given to the first input terminal or the signal given to the second input terminal is determined by the signal given to the third input terminal. a selector that selects and outputs; an adder that inputs the output of the selector to a first input terminal, inputs the digital signal of the register to a second input terminal, and adds the digital signal;
A register that inputs a clock to the input terminal of the register, inputs the output of the adder to the second input terminal, and temporarily holds the signal given to the second input terminal with the signal given to the first input terminal. A resolver digital conversion device characterized by comprising: