JPS5472944A - Preventive system for unneeded wave of impatt-diode injection synchronous amplifier - Google Patents

Preventive system for unneeded wave of impatt-diode injection synchronous amplifier

Info

Publication number
JPS5472944A
JPS5472944A JP14101277A JP14101277A JPS5472944A JP S5472944 A JPS5472944 A JP S5472944A JP 14101277 A JP14101277 A JP 14101277A JP 14101277 A JP14101277 A JP 14101277A JP S5472944 A JPS5472944 A JP S5472944A
Authority
JP
Japan
Prior art keywords
decreases
vin
current
bias current
impatt
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
JP14101277A
Other languages
Japanese (ja)
Other versions
JPS6117364B2 (en
Inventor
Toshio Imai
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 JP14101277A priority Critical patent/JPS5472944A/en
Publication of JPS5472944A publication Critical patent/JPS5472944A/en
Publication of JPS6117364B2 publication Critical patent/JPS6117364B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/66—Amplifiers simultaneously generating oscillations of one frequency and amplifying signals of another frequency

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)

Abstract

PURPOSE:To prevent the generation of unneeded waves and the sudden variaftion in output level, by controlling the bias current of an IMPATT diode corresponding to the magnitude of an input signal. CONSTITUTION:When input signal level Vin decreases, the output of inversional amplifier 7 appears and control transistor Tr8 starts operating. As a result, since the collector potential of Tr8 decreases by the current composed of the collector current of Tr8 flowing to resistor 14 and the base current of Tr9, the base voltage of Tr9 decreases to cause a current flowing to the IMPATT diode to decrease and, in consequence, the self-excitation oscillation output of IMPATT oscillator 1 also decreases. Therefore, when Vin becomes below a certain value, the bias current of oscillator 1 decreases and the ascillation output is decreased. Charaeteristics of Vin of oscillator 1 to the bias current and output level are shown in reference to control unneeded part (alpha) of the bias current with small Vin, part (beta) where the bias current is controlled corresponding to Vin, and saturation part (gamma).
JP14101277A 1977-11-22 1977-11-22 Preventive system for unneeded wave of impatt-diode injection synchronous amplifier Granted JPS5472944A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14101277A JPS5472944A (en) 1977-11-22 1977-11-22 Preventive system for unneeded wave of impatt-diode injection synchronous amplifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14101277A JPS5472944A (en) 1977-11-22 1977-11-22 Preventive system for unneeded wave of impatt-diode injection synchronous amplifier

Publications (2)

Publication Number Publication Date
JPS5472944A true JPS5472944A (en) 1979-06-11
JPS6117364B2 JPS6117364B2 (en) 1986-05-07

Family

ID=15282130

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14101277A Granted JPS5472944A (en) 1977-11-22 1977-11-22 Preventive system for unneeded wave of impatt-diode injection synchronous amplifier

Country Status (1)

Country Link
JP (1) JPS5472944A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013005279A (en) * 2011-06-17 2013-01-07 Mitsubishi Electric Corp Injection-locked oscillator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013005279A (en) * 2011-06-17 2013-01-07 Mitsubishi Electric Corp Injection-locked oscillator

Also Published As

Publication number Publication date
JPS6117364B2 (en) 1986-05-07

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