JPH0189317U - - Google Patents

Description

[Brief explanation of the drawing]

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-to-digital converter, 3 is a quadrant selection circuit, 4 is a cosine multiplier, 5 is a sine multiplier, 6 is a subtracter, 8 is a selector, 8 is an adder, 9 is a register, and 11 is a 12 is a phase detector, 13 is a voltage controlled oscillator, 14 is a reversible counter, and 15 is a sign inverter. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims (1)

[Scope of utility model registration request] a first analog-to-digital converter which inputs one sine wave signal of the two-phase resolver signal at the input end and converts it into a digital signal; and a cosine wave signal of one of the two-phase resolver signals at the input end. Enter
a second analog-to-digital converter for converting into a digital signal and having two inputs;
The output signal of the first analog-to-digital converter is input to the input terminal of the converter, and the output signal of the first analog-to-digital converter is input to the input terminal of
A quadrant selection circuit inputs the output signal of an analog-to-digital converter and outputs two signals according to the angular quadrant; A cosine multiplier that multiplies, a sine multiplier that receives two signals and multiplies them by the sine values of the first and second input signals, and a subtractor that receives two signals and subtracts the two signals. , a sign inverter that inputs one signal and inverts its sign, and a selector that inputs two signals and selects and outputs one of them;
Consists of an adder that adds two signals, a register that inputs the two signals and temporarily holds the second input signal based on the first input signal, and a sign determiner that determines the sign of the input signal. In the resolver/digital conversion device, one of the two output signals of the quadrant selection circuit is inputted to the first input terminal, the signal of the register is inputted to the second input terminal, and the sine wave of one of the two output signals of the quadrant selection circuit is inputted to the second input terminal. a cosine multiplier that multiplies the value of the cosine of the angle at the input end by the signal at the first input end; a sine multiplier that inputs the signal of the register to the input terminal of the register and multiplies the signal of the first input terminal by the value of the sine of the angle of the second input terminal; A subtracter that inputs the output signal of the cosine multiplier, inputs the output signal of the sine multiplier to a second input terminal, and subtracts the two signals, and inputs the output signal of the subtracter to the input terminal. a sign inverter for inverting the sign; a sign determiner for inputting a reference signal to an input terminal and determining the sign thereof; The output signal of the sign inverter is input to the input terminal of the sign inverter, the output signal of the sign determiner is input to the third input terminal, and the signal applied to the third input terminal is applied to the first input terminal. a selector that selects and outputs the signal given to the input terminal or the signal given to the second input terminal; the output signal of the register is input to the first input terminal of the two input terminals; an adder that inputs the output signal of the selector and adds the two signals; a clock signal is input to the first input terminal of the two input terminals; and the output signal of the adder is input to the second input terminal; What is claimed is: 1. A resolver digital conversion device comprising: a register for inputting a signal applied to a first input terminal and temporarily holding a signal applied to a second input terminal;