JPS55104763A - Apparatus for measuring electric circuit - Google Patents

Apparatus for measuring electric circuit

Info

Publication number
JPS55104763A
JPS55104763A JP6070478A JP6070478A JPS55104763A JP S55104763 A JPS55104763 A JP S55104763A JP 6070478 A JP6070478 A JP 6070478A JP 6070478 A JP6070478 A JP 6070478A JP S55104763 A JPS55104763 A JP S55104763A
Authority
JP
Japan
Prior art keywords
circuit
produces
sound
speaker
pulse
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP6070478A
Other languages
Japanese (ja)
Other versions
JPS5650228B2 (en
Inventor
Shin Tsuda
Ryozo Hiraga
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Canon Inc
Original Assignee
Canon Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Canon Inc filed Critical Canon Inc
Priority to JP6070478A priority Critical patent/JPS55104763A/en
Publication of JPS55104763A publication Critical patent/JPS55104763A/en
Publication of JPS5650228B2 publication Critical patent/JPS5650228B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Indicating Measured Values (AREA)
  • Measurement Of Current Or Voltage (AREA)
  • Tests Of Electronic Circuits (AREA)

Abstract

PURPOSE: To eliminate notifying means and prevent in advance an accidental drive of an apparatus for measuring an electric circuit by so constructing the apparatus as to distinguish the electric state of a portion to be measured according to sound and enabling the approximate measurement of the apparatus body without movement of a sight line at all.
CONSTITUTION: A detecting circuit 2 having a detection pointer 1 detects the voltage level of a circuit to be measured to detect whether the electric state of the circuit is high or low level and whether the circuit produces single pulse or pulse train. When the circuit is, for example, high level, a detection signal is introduced to a NAND gate 8. Since the gate 8 is in open standby state with the output from an oscillator circuit 3 and the inhibit output from a monostable multivibrator 5 as a pulse expanding circuit, the circuit 8 is opened and a speaker 15 produces a sound of oscillating frequency f1 of the circuit 3. When the circuit is, for example, low level, the speaker 15 produces a sound of oscillating frequency f2 of an oscillator circuit 4. When the circuit produces a single pulse, the speaker produces a sound of frequency f1 as designated in Fig. A or B. When the circuit produces a pulse train, the speaker produces a sound of frequency f2 as designated by Fig. C. This apparatus may measure whether the circuit produces single pulse or pulse train by hearing the sound.
COPYRIGHT: (C)1980,JPO&Japio
JP6070478A 1978-05-22 1978-05-22 Apparatus for measuring electric circuit Granted JPS55104763A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6070478A JPS55104763A (en) 1978-05-22 1978-05-22 Apparatus for measuring electric circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6070478A JPS55104763A (en) 1978-05-22 1978-05-22 Apparatus for measuring electric circuit

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
JP3762571A Division JPS565938B1 (en) 1970-12-11 1971-05-31

Publications (2)

Publication Number Publication Date
JPS55104763A true JPS55104763A (en) 1980-08-11
JPS5650228B2 JPS5650228B2 (en) 1981-11-27

Family

ID=13149933

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6070478A Granted JPS55104763A (en) 1978-05-22 1978-05-22 Apparatus for measuring electric circuit

Country Status (1)

Country Link
JP (1) JPS55104763A (en)

Also Published As

Publication number Publication date
JPS5650228B2 (en) 1981-11-27

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