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JPS573053A - Measuring circuit for characteristic of decoder - Google Patents

Measuring circuit for characteristic of decoder

Info

Publication number
JPS573053A
JPS573053A JP7617480A JP7617480A JPS573053A JP S573053 A JPS573053 A JP S573053A JP 7617480 A JP7617480 A JP 7617480A JP 7617480 A JP7617480 A JP 7617480A JP S573053 A JPS573053 A JP S573053A
Authority
JP
Japan
Prior art keywords
circuit
input
decoder
output
dut2
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.)
Pending
Application number
JP7617480A
Other languages
Japanese (ja)
Inventor
Hirohisa Karibe
Masao Yamazawa
Toshihiko Matsumura
Hirokazu Fukui
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.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP7617480A priority Critical patent/JPS573053A/en
Publication of JPS573053A publication Critical patent/JPS573053A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00—Analogue/digital conversion; Digital/analogue conversion
    • H03M1/10—Calibration or testing

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Testing Electric Properties And Detecting Electric Faults (AREA)
  • Analogue/Digital Conversion (AREA)

Abstract

PURPOSE:To measure the input and output characteristics of a decoder which does not respond to DC input by measuring the input and output characteristics of the decoder by using the sine waves, etc. of specific frequencies, and arbitrary input signal waveform. CONSTITUTION:Digital sine waves are generated from a digital signal generating circuit 10. The frequency thereof is set in the pass area of the last filter of a decoder (DUT) 2 to be measured. An output fetching select circuit 4 detects the position where the patterns generated by the circuit 10 assumes a specific code, fetches the analog output of the DUT2 corresponding to said input, transmits the same to a level measuring circuit 3, and interrupts the analog outputs corresponding to other codes. The response of the circuit 3 is usually slow as compared to the conversion period of the DUT2, and therefore, in the circuit 3 the analog outputs past the circuit 4 are integrated, whereby level detection is carried out, and the processing similar to the level detection of DC input is accomplished.
JP7617480A 1980-06-06 1980-06-06 Measuring circuit for characteristic of decoder Pending JPS573053A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7617480A JPS573053A (en) 1980-06-06 1980-06-06 Measuring circuit for characteristic of decoder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7617480A JPS573053A (en) 1980-06-06 1980-06-06 Measuring circuit for characteristic of decoder

Publications (1)

Publication Number Publication Date
JPS573053A true JPS573053A (en) 1982-01-08

Family

ID=13597724

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7617480A Pending JPS573053A (en) 1980-06-06 1980-06-06 Measuring circuit for characteristic of decoder

Country Status (1)

Country Link
JP (1) JPS573053A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58175304A (en) * 1982-04-07 1983-10-14 Teac Co digital signal generator
JPS6215930A (en) * 1985-07-15 1987-01-24 Hitachi Ltd D/A converter test method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58175304A (en) * 1982-04-07 1983-10-14 Teac Co digital signal generator
JPS6215930A (en) * 1985-07-15 1987-01-24 Hitachi Ltd D/A converter test method

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