Title:
OSCILLATOR
Document Type and Number:
Japanese Patent JP3469970
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide an oscillation circuit having an oscillating operation stop mode with which the fault of a short-circuit having a certain incomplete resistance component at an oscillate signal output terminal can be detected.
SOLUTION: An oscillation control circuit 9 is provided for selecting one of two input signals at an oscillation signal input terminal 1 and an input terminal 8 for oscillation output level set based on the input signal of an input terminal 2 for oscillation control and outputting that selected signal from an oscillation signal output terminal 4, and a feedback resistor 10 to be controlled by the input signal of the input terminal 2 for oscillation control is provided between the oscillation signal output terminal 4 and the oscillation signal input terminal 1. At the time of ordinary oscillation, an oscillating operation is performed by outputting the input signal to the oscillation signal input terminal 1 from the oscillation signal output terminal 4. At the time of oscillation stop, the oscillation signal output terminal 4 is set at an arbitrary output level based on to the input signal of the input terminal 8 for oscillation output level set and a fine leak current in the case of measuring the static power supply current of a semiconductor integrated circuit is detected, so that the incomplete short-circuit fault having a certain resistant component at the oscillation signal output terminal 4 can be detected.
More Like This:
| JP2006178854 | ELECTRONIC CIRCUIT |
| JP5885501 | Electronic devices, their control methods, programs, and recording media |
| JP2000330675 | DEVICE AND METHOD FOR POWER MANAGEMENT |
Inventors:
Katsuya Fujimura
Application Number:
JP22647195A
Publication Date:
November 25, 2003
Filing Date:
September 04, 1995
Export Citation:
Assignee:
Matsushita Electric Industrial Co., Ltd
International Classes:
G06F1/04; H03K3/02; (IPC1-7): H03K3/02
Domestic Patent References:
| JP6480105A | ||||
| JP6204748A | ||||
| JP6161596A | ||||
| JP6363204A | ||||
| JP722910A | ||||
| JP427211A | ||||
| JP5870604A |
Attorney, Agent or Firm:
Akio Miyai