JPS55166316A - Pulse duration modulating amplifier - Google Patents

Pulse duration modulating amplifier

Info

Publication number
JPS55166316A
JPS55166316A JP7508179A JP7508179A JPS55166316A JP S55166316 A JPS55166316 A JP S55166316A JP 7508179 A JP7508179 A JP 7508179A JP 7508179 A JP7508179 A JP 7508179A JP S55166316 A JPS55166316 A JP S55166316A
Authority
JP
Japan
Prior art keywords
trq5
current
circuits
switching
level
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
JP7508179A
Other languages
Japanese (ja)
Other versions
JPS6121006B2 (en
Inventor
Akio Tokuge
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.)
Pioneer Corp
Original Assignee
Pioneer Electronic Corp
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 Pioneer Electronic Corp filed Critical Pioneer Electronic Corp
Priority to JP7508179A priority Critical patent/JPS55166316A/en
Publication of JPS55166316A publication Critical patent/JPS55166316A/en
Publication of JPS6121006B2 publication Critical patent/JPS6121006B2/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
    • H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
    • H03F3/21—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only
    • H03F3/217—Class D power amplifiers; Switching amplifiers

Landscapes

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

Abstract

PURPOSE:To simplify the constitution of the necessary muting function, by increasing enough the output voltage of the driver step forming a pulse modulating amplifier via the current switching logic circuit and at the same time securing the constant level for the output voltage to accelerate the rise and the fall. CONSTITUTION:Current switching logic (CML) circuits 10 and 11 are provided to produce the driving signals for output switching transistors (TR)Q3 and Q4 of the pulse duration modulating amplifier, and a pair of switching circuits comprising differential pairs TRQ5, Q6 plus Q7, Q8 are provided to circuits 10 and 11 each. Furthermore, constant current cources 5 and 6 are connected to the common emitter for TRQ5, Q6 plus Q7, Q8 each, and collector load resistances R4, R5 are connected to TRQ5, Q7 of one side. Then the fixed bias is applied to the bases of TRQ6, Q8 from the base bias circuit consisting of resistances R6, R7, R9, R8 each. And the current is supplied selectively to TRQ5, Q7 of one side in circuits 10 and 11 in accordance with the level of input signal B, and the current is supplied to TRQ6, Q8 via TRQ5, Q7. Thus the switching level is made constant for TRQ3, Q4 to ensure the assured control.
JP7508179A 1979-06-14 1979-06-14 Pulse duration modulating amplifier Granted JPS55166316A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7508179A JPS55166316A (en) 1979-06-14 1979-06-14 Pulse duration modulating amplifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7508179A JPS55166316A (en) 1979-06-14 1979-06-14 Pulse duration modulating amplifier

Publications (2)

Publication Number Publication Date
JPS55166316A true JPS55166316A (en) 1980-12-25
JPS6121006B2 JPS6121006B2 (en) 1986-05-24

Family

ID=13565866

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7508179A Granted JPS55166316A (en) 1979-06-14 1979-06-14 Pulse duration modulating amplifier

Country Status (1)

Country Link
JP (1) JPS55166316A (en)

Also Published As

Publication number Publication date
JPS6121006B2 (en) 1986-05-24

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