JPH0420730U

JPH0420730U -

Info

Publication number: JPH0420730U
Application number: JP6294990U
Authority: JP
Priority date: 1990-06-14
Filing date: 1990-06-14
Publication date: 1992-02-21

Description

[Brief explanation of the drawing]

第１図〜第４図はこの考案の実施例を示す図、
第５図は従来のアナログ・デイジタル変換装置を
示す図である。図において１はスコツト・トランス、２は象限
選択器、３は余弦乗算器、４は正弦乗算器、５は
引き算器、６は符号反転器、７は第１の選択器、
８は加算器、９は第１のレジタ、１０は符号判定
器、１１は第２のレジスタ、１２は比較器、１３
は第２の選択器、１４は位相検波器、１５は電圧
制御発振器、１６は可逆カウンタ、１７はアナロ
グ・デイジタル変換器である。なお、図中同一符
号は同一または相当部分を示す。 Figures 1 to 4 are diagrams showing embodiments of this invention;
FIG. 5 is a diagram showing a conventional analog-to-digital converter. In the figure, 1 is a Scott transformer, 2 is a quadrant selector, 3 is a cosine multiplier, 4 is a sine multiplier, 5 is a subtracter, 6 is a sign inverter, 7 is a first selector,
8 is an adder, 9 is a first register, 10 is a sign determiner, 11 is a second register, 12 is a comparator, 13
is a second selector, 14 is a phase detector, 15 is a voltage controlled oscillator, 16 is a reversible counter, and 17 is an analog-to-digital converter. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims

[Claims for Utility Model Registration] (1) A first analog-to-digital converter that inputs a sine wave signal of a resolver signal to an input terminal and converts it into a digital signal, and a first analog-digital converter that inputs a cosine wave signal of a resolver signal to an input terminal. a second analog-to-digital converter for converting into a digital signal; the output signal of the first analog-to-digital converter is input to the first input terminal of the two input terminals;
input the first input signal and the second input signal.
a cosine multiplier that multiplies the cosine value of an input signal; a first input terminal of the two input terminals receives the output signal of the second analog-to-digital converter; input the register signal of the first
a sine multiplier that multiplies an input signal by the sine value of a second input signal; a first input terminal receives the output of the cosine multiplier, and a second input terminal receives the output of the sine multiplier. a subtracter that inputs and subtracts two signals; an output signal of the subtracter is input to the input terminal;
a sign inverter that inverts the sign; a sign determiner that inputs a reference signal to its input terminal and determines its sign; The output signal of the subtracter is inputted to the second input terminal, the output signal of the sign inverter is inputted to the third input terminal, and the second input signal is inputted by the first input signal.
a first selector that selects and outputs an input signal or a third input signal; a second input terminal receives the output of the first selector; and a second input terminal receives a digital signal of the first register; An adder that inputs and adds signals,
A clock is input to the first input terminal, the output of the adder is input to the second input terminal, and the signal given to the second input terminal is temporarily held with the signal given to the first input terminal. a first register, and a second register that receives the output signal of the first register and stores the input signal.
a comparator that inputs the output signal of the first register and the output signal of the second register and compares the two signals, and a comparator that inputs the output signal of the first register and the output signal of the second register, and an analog-to-digital converter comprising: a second selector which receives an output signal from the comparator, selects two input signals based on the output signal of the comparator, and outputs the selected input signal; (2) A quadrant selector that inputs the sine wave of the resolver signal to two input terminals, inputs the cosine wave of the resolver signal to the second input terminal, and outputs the quadrant-selected sine wave and cosine wave signals. , a first analog-to-digital converter that inputs the sine wave signal of the quadrant selector to its input terminal and converts it into a digital signal; and a first analog-to-digital converter that inputs the cosine wave signal of the quadrant selector to its input terminal and converts it to a digital signal. a second analog-to-digital converter having a second analog-to-digital converter;
a cosine multiplier which inputs the output signal of the analog-to-digital converter, inputs the first register signal to the second input terminal, and multiplies the cosine value of the first input signal and the second input signal; , the output signal of the second analog-to-digital converter is input to the first input terminal of the two input terminals, the first register signal is input to the second input terminal, and the first input signal and the first register signal are input. a sine multiplier that multiplies the sine values of the two input signals;
The output of the cosine multiplier is input to the input terminal of the second
a subtracter that inputs the output of the sine multiplier to the input terminal and subtracts two signals; a sign inverter that inputs the output signal of the subtracter to the input terminal and inverts the sign; and a reference signal to the input terminal. a sign determiner that inputs the input signal and determines its sign; an output signal of the sign determiner is input to a first input terminal of the three input terminals, and an output signal of the subtracter is input to a second input terminal; , input the output signal of the sign inverter to the third input terminal, and input the output signal of the sign inverter to the third input terminal;
a first selector that selects and outputs a second input signal or a third input signal according to an input signal;
an adder which inputs the digital signal of the first register to the input terminal and adds them; and an adder which inputs the clock to the first input terminal and inputs the output of the adder to the second input terminal, and adds the digital signal to the first input terminal. a first register that temporarily holds an output given to a second input terminal with a signal given to the first register; a second register that receives the output signal of the first register and stores the input signal; a comparator that inputs the output signal of the first register and the output signal of the second register and compares the two signals;
and a second selector which receives the output signal of the register and selects and outputs two input signals based on the output signal of the comparator. (3) A Scott transformer that inputs a three-phase synchro signal and converts it into a two-phase resolver signal, and a first input terminal that inputs a sine wave signal of the resolver signal of the Scott transformer and converts it into a digital signal.
a second analog-to-digital converter that inputs the cosine wave signal of the resolver signal of the Scott transformer to its input end and converts it into a digital signal;
The output signal of the first analog-to-digital converter is input to the input terminal of the converter, the first register signal is input to the second input terminal of the converter, and the value of the cosine of the first input signal and the second input signal is input. a cosine multiplier that multiplies 2
The output signal of the second analog-to-digital converter is input to the first input terminal of the two input terminals, the first register signal is input to the second input terminal, and the first input signal and the second A sine multiplier that multiplies the sine value of an input signal, the output of the cosine multiplier is input to a first input terminal, the output of the sine multiplier is input to a second input terminal, and the two signals are subtracted. and a subtractor to
a sign inverter that inputs the output signal of the subtracter to an input terminal and inverts the sign; a sign determiner that inputs a reference signal to the input terminal and determines the sign; and a first input terminal of the three input terminals. First, input the output signal of the sign determiner, input the output signal of the subtracter to the second input terminal, input the output signal of the sign inverter to the third input terminal, and input the output signal of the sign inverter to the third input terminal. 2nd depending on the input signal
a first selector that selects and outputs an input signal or a third input signal; the output of the first selector is input to a first input terminal, and the output of the first register is input to a second input terminal; An adder that inputs and adds digital signals; a clock is input to a first input terminal; the output of the adder is input to a second input terminal; and a second signal is input to the first input terminal; a first register that temporarily holds the signal applied to the input terminal; a second register that receives the output signal of the first register and stores the input signal; a comparator that inputs the output signal of the second register and compares the two signals; and a comparator that inputs the output signal of the first register and the output signal of the second register and uses the output signal of the comparator to compare the two signals. An analog-to-digital conversion device comprising: a second selector that selects and outputs an input signal. (4) A SCOTT transformer that inputs a 3-phase synchro signal and outputs a 2-phase resolver signal, and a sine wave whose quadrant is selected by inputting the sine wave and cosine wave signals of the resolver signal output from the SCOTT transformer. a quadrant selector that outputs a cosine wave signal, a first analog-to-digital converter that inputs the sine wave signal of the quadrant selector at an input end and converts it into a digital signal, and a quadrant selector that outputs a cosine wave signal at an input end. a second analog-to-digital converter that inputs a cosine wave signal and converts it into a digital signal;
The output signal of the first analog-to-digital converter is input to the input terminal of the converter, the first register signal is input to the second input terminal of the converter, and the value of the cosine of the first input signal and the second input signal is input. a cosine multiplier that multiplies 2
The output signal of the second analog-to-digital converter is input to the first input terminal of the two input terminals, the first register signal is input to the second input terminal, and the first input signal and the second A sine multiplier that multiplies the sine value of an input signal, the output of the cosine multiplier is input to a first input terminal, the output of the sine multiplier is input to a second input terminal, and the two signals are subtracted. and a subtractor to
a sign inverter that inputs the output signal of the subtracter to an input terminal and inverts the sign; a sign determiner that inputs a reference signal to the input terminal and determines the sign thereof; and a first input terminal of the three input terminals. The output signal of the sign determiner is inputted, the output signal of the subtracter is inputted to a second input terminal, the output signal of the sign inverter is inputted to a third input terminal, and the output signal of the sign inverter is inputted to a second input terminal. a first selector that selects and outputs a second input signal or a third input signal; a first selector inputs the output of the first selector to a first input terminal; An adder that inputs and adds digital signals from a register, inputs a clock to a first input terminal, inputs the output of the adder to a second input terminal, and adds a signal given to the first input terminal. a first register that temporarily holds a signal applied to the input terminal of the first register; a second register that receives the output signal of the first register and stores the input signal; and an output signal of the first register. and a comparator that inputs the output signal of the second register and compares the two signals, and a comparator that inputs the output signal of the first register and the output signal of the second register and uses the output signal of the comparator. An analog-to-digital conversion device comprising: a second selector that selects and outputs two input signals.