Semiconductor device, motor control device, lens unit for imaging apparatus, and imaging apparatus

Patent metadata

Field	Value
Publication number	US-10082785-B2
Application number	US-201715617998-A
Country	US
Kind code	B2
Filing date	Jun 8, 2017
Priority date	Aug 20, 2014
Publication date	Sep 25, 2018
Grant date	Sep 25, 2018

Abstract

A motor control, device that controls a motor, includes: a plurality of processors, each being adapted to generate information for generating a pulse width modulation (PWM) signal; a plurality of PWM signal generation circuits, each being provided corresponding to each of the processors and adapted to generate the PWM signal on the basis of the information that has been generated by the corresponding processor; and a switch circuit that selectively gives the information generated by each of the processors to any of the PWM signal generation circuits.

First claim

What is claimed is:

1. A motor control device that controls a motor, comprising:
a plurality of processors, each being adapted to generate information for generating a pulse width modulation (PWM) signal;
a plurality of PWM signal generation circuits, each being provided corresponding to each of the processors and adapted to generate the PWM signal on the basis of the information that has been generated by the corresponding processor; and
a switch circuit that selectively gives the information generated by each of the processors to any of the PWM signal generation circuits.

2. The motor control device according to claim 1 , further comprising:
a plurality of output terminals to any of which is selectively provided the PWM signal generated by each of the PWM signal generation circuits.

3. The motor control device according to claim 1 , further comprising:
a second switch circuit that selectively gives the information generated by each of the processors to any of the PWM signal generation circuits.

4. The motor control device according to claim 2 , further comprising:
a register into which a corresponding relation between each of the PWM signal generation circuits and each of the output terminals is written,
wherein the switch circuit gives the PWM signal generated by each of the PWM signal generation circuits to the corresponding output terminal on the basis of the corresponding relation written into the register.

5. The motor control device according to claim 2 , further comprising:
a second switch circuit that selectively gives the information generated by each of the processors to any of the PWM signal generation circuits.

6. The motor control device according to claim 3 , further comprising:
a register into which a first corresponding relation between each of the PWM signal generation circuits and each of the output terminals and a second corresponding relation between each of the processors and each of the PWM signal generation circuits are written,
wherein the switch circuit gives the PWM signal generated by each of the PWM signal generation circuits to the corresponding output terminal on the basis of the first corresponding relation written into the register and the second switch circuit gives the information generated by each of the processors to the corresponding PWM signal generation circuit on the basis of the second corresponding relation written into the register.

7. The motor control device according to claim 2 , further comprising:
a plurality of logic circuits, each being provided corresponding to each of the output terminals,
wherein the switch circuit selectively gives the PWM signal generated by each of the PWM signal generation circuits to any one or a plurality of the logic circuits, and each of the logic circuits gives a signal that has been generated on the basis of one or a plurality of PWM signal/signals given from the switch circuit to the corresponding output terminal.

8. The motor control device according to claim 7 , further comprising:
a register into which a corresponding relation between each of the PWM signal generation circuits and a plurality of input nodes of each of the logic circuits is written,
wherein the switch circuit gives the PWM signal generated by each of the PWM signal generation circuits to the corresponding logic circuit on the basis of the corresponding relation written into the register.

9. The motor control device according to claim 7 ,
wherein each of the logic circuits includes an OR gate.

10. The motor control device according to claim 7 ,
wherein each of the logic circuits includes an AND gate.

11. The motor control device according to claim 7 ,
wherein each of the logic circuits includes a flip flop that is set with one PWM signal given from the switch circuit to output a signal of a first logic level, and is reset with another PWM signal given from the switch circuit to output a signal of a second logic level.

12. The motor control device according to claim 2 , further comprising:
a plurality of interruption controllers, each being provided corresponding to each of the processors,
wherein the switch circuit selectively gives the PWM signal generated by each of the PWM signal generation circuits to any of the interruption controllers, each of the interruption controllers generates a timing control signal on the basis of the PWM signal given from the first switch circuit and gives the generated timing control signal to the corresponding processor, and each of the processors generates the PWM signal on the basis of the timing control signal given from the corresponding interruption controller.

13. The motor control device according to claim 2 , further comprising:
a plurality of interruption controllers, each being provided corresponding to each of the processors,
wherein a plurality of motors are used to respectively adjust positions of a plurality of objects, a plurality of position, sensors that respectively detect the positions of the objects are included, the switch circuit selectively gives a position detection signal generated by each of the position sensors to any of the interruption controllers, and each of the interruption controllers generates a position control signal on the basis of the position detection signal given from the switch circuit and gives the generated position control signal to the corresponding processor, and
wherein each of the processors generates the PWM signal on the basis of the position control signal given from the corresponding interruption controller.

14. The motor control device according to claim 2 ,
wherein a plurality of the PWM signals output from the output terminals are respectively used to control a plurality of motors.

15. The motor control device according to claim 2 ,
wherein three PWM signals output from three output terminals in the output terminals are used to control a three-phase motor.

16. A semiconductor device that outputs a pulse width modulation (PWM) signal, comprising:
a plurality of PWM signal generation circuits;
a switch circuit;
a memory circuit; and
a central processing unit (CPU),
wherein each of the PWM signal generation circuits generates a PWM signal that is based on a control signal supplied from the CPU, and
wherein the switch circuit outputs each of the generated PWM signals on the basis of coupling information stored in the memory circuit.

17. A lens unit for an imaging apparatus, comprising:
a plurality of lenses;
a plurality of motors that drive the lenses;
a motor control device that outputs a plurality of pulse width modulation (PWM) signals; and
a driver device that applies a drive current that is based on each of the PWM signals to each of the motors,
wherein the motor control device includes a plurality of PWM signal generation circuits, a switch circuit, a memory circuit and a CPU, each of the PWM signal generation circuits generates each PWM signal that is based on a control signal supplied from the CPU, and the switch circuit includes outputs each of the generated PWM signals on the basis of coupling information stored in the memory circuit.

18. An imaging apparatus, comprising
the lens unit for imaging apparatus according to claim 17 .

Assignees

• Renesas Electronics Corp

Inventors

• Endo Shigeyuki

Classifications

• G03B5/00

  Adjustment of optical system relative to image or object surface other than for focusing · CPC title

• G05B19/414 Primary

  Structure of the control system, e.g. common controller or multiprocessor systems, interface to servo, programmable interface controller · CPC title

• H02P5/69

  mechanically coupled by gearing · CPC title

• G03B3/10

  Power-operated focusing · CPC title

• G03B2205/0046

  Movement of one or more optical elements for zooming · CPC title