JPS57151873A - Device for measuring transistor power gain - Google Patents

Device for measuring transistor power gain

Info

Publication number
JPS57151873A
JPS57151873A JP3755681A JP3755681A JPS57151873A JP S57151873 A JPS57151873 A JP S57151873A JP 3755681 A JP3755681 A JP 3755681A JP 3755681 A JP3755681 A JP 3755681A JP S57151873 A JPS57151873 A JP S57151873A
Authority
JP
Japan
Prior art keywords
circuit
transistor
frequency
oscillator
power gain
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
JP3755681A
Other languages
Japanese (ja)
Inventor
Isao Fujiki
Kazuji Ashizawa
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP3755681A priority Critical patent/JPS57151873A/en
Publication of JPS57151873A publication Critical patent/JPS57151873A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/26—Testing of individual semiconductor devices
    • G01R31/2607—Circuits therefor
    • G01R31/2608—Circuits therefor for testing bipolar transistors
    • G01R31/2614—Circuits therefor for testing bipolar transistors for measuring gain factor thereof

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Testing Of Individual Semiconductor Devices (AREA)

Abstract

PURPOSE:To obtain the highly efficient, highly reliable gain measuring device which is readily operated, by detecting the resonance of a circuit under test, fixing an oscillating frequency, and measuring the power gain of the transistor. CONSTITUTION:The oscillating frequency of a voltage controlled oscillator 11, wherein the oscillating frequency is controlled stepwise, is fixed to the resonant frequency of the circuit under test 6, which is formed by input and output tuning circuits, a reference transistor which couples said circuits, and the like. The input and output matching and tuning are performed in the circuit 6. When the reference transistor of the circuit 6 is replaced by a transistor to be tested, and a step voltage generator 14 is started, the detecting level of a broad band detector 13 is increased. The voltage is decreased after the circuit 6 has been resonated. Then the generator 14 is returned to the step immediately before, and the frequency of the oscillator 11 is readily and accurately fixed to the resonance frequency. The maximum power gain PG of the transistor is determined by the equation I, based on the output level P1 of the oscillator 11 and the input level P2 of the detector 13. Thus, the readily operable, highly efficient, highly reliable gain measuring device is obtained. alpha in the equation is a matching loss of the circuit 6.
JP3755681A 1981-03-16 1981-03-16 Device for measuring transistor power gain Pending JPS57151873A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3755681A JPS57151873A (en) 1981-03-16 1981-03-16 Device for measuring transistor power gain

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3755681A JPS57151873A (en) 1981-03-16 1981-03-16 Device for measuring transistor power gain

Publications (1)

Publication Number Publication Date
JPS57151873A true JPS57151873A (en) 1982-09-20

Family

ID=12500784

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3755681A Pending JPS57151873A (en) 1981-03-16 1981-03-16 Device for measuring transistor power gain

Country Status (1)

Country Link
JP (1) JPS57151873A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0684727U (en) * 1994-03-22 1994-12-02 日動電工株式会社 Flexible conduit connector
JP2009210393A (en) * 2008-03-04 2009-09-17 Nec Corp Load pull measuring fixture

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0684727U (en) * 1994-03-22 1994-12-02 日動電工株式会社 Flexible conduit connector
JP2009210393A (en) * 2008-03-04 2009-09-17 Nec Corp Load pull measuring fixture

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