JPS5567660A - Power maker circuit - Google Patents

Power maker circuit

Info

Publication number
JPS5567660A
JPS5567660A JP14115078A JP14115078A JPS5567660A JP S5567660 A JPS5567660 A JP S5567660A JP 14115078 A JP14115078 A JP 14115078A JP 14115078 A JP14115078 A JP 14115078A JP S5567660 A JPS5567660 A JP S5567660A
Authority
JP
Japan
Prior art keywords
load
voltage
current
fed
collectors
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
JP14115078A
Other languages
Japanese (ja)
Other versions
JPS627510B2 (en
Inventor
Gichu Oota
Nobutaka Amada
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP53141150A priority Critical patent/JPS627510B2/ja
Publication of JPS5567660A publication Critical patent/JPS5567660A/en
Publication of JPS627510B2 publication Critical patent/JPS627510B2/ja
Expired legal-status Critical Current

Links

Abstract

PURPOSE: To indicate the power fed to the load correctly, by independently detecting the current and voltage fed to the load with the audio output amplifier and multiplying them.
CONSTITUTION: The load current flows to the NPN transistor 2 and the resistor 4 and a voltage proportional to the load current appears across the resistor 4. This voltage is fed to the base of the transistors 13 and 14, and the multiple of differential gain of the NPN transistors 13 and 14 is appeared between the collectors. On the other hand, the current flowing to the NPN transistor 15 is the value of the output terminal 6 voltage, that is, load voltage with the value of the resistor 19 appoximately. Between the collectors of the NPN transistors 13 and 14, the voltage proportional to the power fed to the load 7 is produced. Accordingly, the current proportional to the power fed to the load 7 flows to the ammeter 11 connected between the collectors of the NPN transistors 13 and 14.
COPYRIGHT: (C)1980,JPO&Japio
JP53141150A 1978-11-17 1978-11-17 Expired JPS627510B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP53141150A JPS627510B2 (en) 1978-11-17 1978-11-17

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP53141150A JPS627510B2 (en) 1978-11-17 1978-11-17

Publications (2)

Publication Number Publication Date
JPS5567660A true JPS5567660A (en) 1980-05-21
JPS627510B2 JPS627510B2 (en) 1987-02-17

Family

ID=15285298

Family Applications (1)

Application Number Title Priority Date Filing Date
JP53141150A Expired JPS627510B2 (en) 1978-11-17 1978-11-17

Country Status (1)

Country Link
JP (1) JPS627510B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6013474U (en) * 1983-07-06 1985-01-29 ヤマハ株式会社 Load power detection circuit

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0632061B2 (en) * 1990-08-27 1994-04-27 喜光 松本 Analog multiplication / averaging circuit and power meter circuit using the circuit

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5340738U (en) * 1976-09-10 1978-04-08

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5340738B2 (en) * 1975-08-18 1978-10-28

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5340738U (en) * 1976-09-10 1978-04-08

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6013474U (en) * 1983-07-06 1985-01-29 ヤマハ株式会社 Load power detection circuit
JPS6315819Y2 (en) * 1983-07-06 1988-05-06

Also Published As

Publication number Publication date
JPS627510B2 (en) 1987-02-17

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