JPH0189318U - - 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-digital converter, 4 is a cosine multiplier, 5 is a sine multiplier, 6 is a subtracter, 7 is a selector, 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, 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 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 value of the first input signal and a second input signal, a subtracter that inputs two signals and subtracts the two signals, and a subtracter that inputs one signal and multiplies its sign. a selector that inputs two signals and selects and outputs one of them; an adder that inputs two signals and adds the two signals; and a selector that inputs two signals and adds the two signals. In a resolver/digital converter, the device includes a register that temporarily holds a second input signal in response to a first input signal, and a sign determiner that determines the sign of the input signal. - A cosine multiplier that inputs the output signal of the digital converter and multiplies the value of the cosine of the angle at the second input terminal by the signal at the first input terminal; a sine multiplier that inputs the output signal of the digital converter, inputs the signal of the register to a second input terminal, and multiplies the signal of the first input terminal by the value of the sine of the angle at the second input terminal; , a subtracter that inputs the output signal of the cosine multiplier to a first input terminal of two input terminals, inputs the output signal of the sine multiplier to a second input terminal, and subtracts the two signals; a sign inverter that inputs the output 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 The output signal of the subtracter is inputted, the output signal of the sign inverter is inputted to the second input terminal, the output signal of the sign determiner is inputted to the third input terminal, and the signal is applied to the third input terminal. a selector that selects and outputs the signal applied to the first input terminal or the signal applied to the second input terminal according to the input signal; and the output signal of the register is input to the first input terminal of the two input terminals. is input, the output signal of the selector is input to the second input terminal, an adder 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 selector is input to the second input terminal. and a register that inputs the output signal 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.・Digital conversion device.