JPS5514731A - Output circuit of transistor amplifier - Google Patents

Output circuit of transistor amplifier

Info

Publication number
JPS5514731A
JPS5514731A JP8727878A JP8727878A JPS5514731A JP S5514731 A JPS5514731 A JP S5514731A JP 8727878 A JP8727878 A JP 8727878A JP 8727878 A JP8727878 A JP 8727878A JP S5514731 A JPS5514731 A JP S5514731A
Authority
JP
Japan
Prior art keywords
output
frequency
transistors
turned
input signal
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
JP8727878A
Other languages
Japanese (ja)
Other versions
JPS606573B2 (en
Inventor
Itaru Sakaida
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.)
TRIO KENWOOD CORP
Kenwood KK
Original Assignee
TRIO KENWOOD CORP
Kenwood KK
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 TRIO KENWOOD CORP, Kenwood KK filed Critical TRIO KENWOOD CORP
Priority to JP53087278A priority Critical patent/JPS606573B2/en
Priority to US05/950,457 priority patent/US4216437A/en
Publication of JPS5514731A publication Critical patent/JPS5514731A/en
Publication of JPS606573B2 publication Critical patent/JPS606573B2/en
Expired 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
    • H03F3/30—Single-ended push-pull [SEPP] amplifiers; Phase-splitters therefor
    • H03F3/3069—Single-ended push-pull [SEPP] amplifiers; Phase-splitters therefor the emitters of complementary power transistors being connected to the output
    • H03F3/3076—Single-ended push-pull [SEPP] amplifiers; Phase-splitters therefor the emitters of complementary power transistors being connected to the output with symmetrical driving of the end stage
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/52—Circuit arrangements for protecting such amplifiers

Landscapes

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

Abstract

PURPOSE:To secure the safety operation for the output transistor with the reactance load as well as to prevent the distortion of the amplification characteristics at the high frequency input region. CONSTITUTION:The time constant of the circuit which forms the charge/discharge paths of capacity 18 and 19 is set to the value smaller than frequency fD with which output transistors 1 and 2 are broken by the phase rotation caused by the reactance of load 3 by adjusting resistances 12-15. The frequency fT at that time features relation of fT>fD. At common output terminal A, transistors 4 and 6 are turned off when the output current and voltage feature the same phase to perform the normal SEPP action. In case the phase difference exists with the input signal frequency less than fT, terminal A features the negative potential during the positive period of the input signal to actuate transistors 4 and 5. And then the first amplifier circuit operates to share the output of output transistor 1, thus securing the safety operation. Element 2 and the second amplifier circuit feature the same relation. When the frequency exceeds fT, elements 4-7 are all turned off to give no actuation to both the first and second amplifiers. Thus the switching distortion is never caused.
JP53087278A 1977-10-14 1978-07-18 Transistor amplifier output circuit Expired JPS606573B2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP53087278A JPS606573B2 (en) 1978-07-18 1978-07-18 Transistor amplifier output circuit
US05/950,457 US4216437A (en) 1977-10-14 1978-10-11 Protective circuitry for push-pull amplifiers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP53087278A JPS606573B2 (en) 1978-07-18 1978-07-18 Transistor amplifier output circuit

Publications (2)

Publication Number Publication Date
JPS5514731A true JPS5514731A (en) 1980-02-01
JPS606573B2 JPS606573B2 (en) 1985-02-19

Family

ID=13910304

Family Applications (1)

Application Number Title Priority Date Filing Date
JP53087278A Expired JPS606573B2 (en) 1977-10-14 1978-07-18 Transistor amplifier output circuit

Country Status (1)

Country Link
JP (1) JPS606573B2 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5979636A (en) * 1982-10-27 1984-05-08 Rohm Co Ltd Driving circuit of capacitive load
US8773833B2 (en) 2011-02-04 2014-07-08 Denso Corporation Electronic control device including interrupt wire
US8780518B2 (en) 2011-02-04 2014-07-15 Denso Corporation Electronic control device including interrupt wire
US8971003B2 (en) 2011-02-04 2015-03-03 Denso Corporation Electronic control device including interrupt wire
US8971006B2 (en) 2011-02-04 2015-03-03 Denso Corporation Electronic control device including interrupt wire
US9148948B2 (en) 2011-02-04 2015-09-29 Denso Corporation Electronic control device including interrupt wire

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5979636A (en) * 1982-10-27 1984-05-08 Rohm Co Ltd Driving circuit of capacitive load
US8773833B2 (en) 2011-02-04 2014-07-08 Denso Corporation Electronic control device including interrupt wire
US8780518B2 (en) 2011-02-04 2014-07-15 Denso Corporation Electronic control device including interrupt wire
US8971003B2 (en) 2011-02-04 2015-03-03 Denso Corporation Electronic control device including interrupt wire
US8971006B2 (en) 2011-02-04 2015-03-03 Denso Corporation Electronic control device including interrupt wire
US9148948B2 (en) 2011-02-04 2015-09-29 Denso Corporation Electronic control device including interrupt wire

Also Published As

Publication number Publication date
JPS606573B2 (en) 1985-02-19

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