JPS5546891A - Load driving circuit - Google Patents

Load driving circuit

Info

Publication number
JPS5546891A
JPS5546891A JP11826478A JP11826478A JPS5546891A JP S5546891 A JPS5546891 A JP S5546891A JP 11826478 A JP11826478 A JP 11826478A JP 11826478 A JP11826478 A JP 11826478A JP S5546891 A JPS5546891 A JP S5546891A
Authority
JP
Japan
Prior art keywords
trq
constant current
circuit
switching
load
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
JP11826478A
Other languages
Japanese (ja)
Inventor
Satoru Honda
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 JP11826478A priority Critical patent/JPS5546891A/en
Priority to US06/077,066 priority patent/US4321515A/en
Publication of JPS5546891A publication Critical patent/JPS5546891A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To drive a specified load to saturation at a constant current in a single circuit constitution, by selectively switching activation of a constant-current source and activation of a bias means which gives a bias to an output-transistor contol electrode.
CONSTITUTION: A constant current source 1 is activated by switching a movable contact d of a switch S to a fixed contact point b in a switching circuit 2 and one end of a resistor 2 is grounded, thereby a transistor TRQ2 for driving a load L1 is driven at a constant current. A base bias circuit 3 for the output TRQ1, which comprises TRQ3, diode D3, resistors R5 and R6, is provided so as to drive the output TRQ1, saturate TRQ2, or to bring them to the nearby states of said operations. Then, TRQ3 is turned on by switching the contact d to another fixed contact point c, thereby the bias circuit 3 is activated. In this very simple single-circuit constitution, the load can be driven at a constant current to saturation.
COPYRIGHT: (C)1980,JPO&Japio
JP11826478A 1978-09-22 1978-09-26 Load driving circuit Pending JPS5546891A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP11826478A JPS5546891A (en) 1978-09-26 1978-09-26 Load driving circuit
US06/077,066 US4321515A (en) 1978-09-22 1979-09-19 Tape recorder control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11826478A JPS5546891A (en) 1978-09-26 1978-09-26 Load driving circuit

Publications (1)

Publication Number Publication Date
JPS5546891A true JPS5546891A (en) 1980-04-02

Family

ID=14732317

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11826478A Pending JPS5546891A (en) 1978-09-22 1978-09-26 Load driving circuit

Country Status (1)

Country Link
JP (1) JPS5546891A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02500263A (en) * 1987-05-27 1990-02-01 マートル　ヴィーグビヨルン A device that uses a bed shelf that can be raised and lowered in a compartment with limited space.

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS431564Y1 (en) * 1964-02-05 1968-01-24

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS431564Y1 (en) * 1964-02-05 1968-01-24

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02500263A (en) * 1987-05-27 1990-02-01 マートル　ヴィーグビヨルン A device that uses a bed shelf that can be raised and lowered in a compartment with limited space.

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