Title:
POWER SOURCE SUPPLY CIRCUIT FOR MULTI-CHANNEL ELECTRONIC EQUIPMENT
Document Type and Number:
Japanese Patent JP3523361
Kind Code:
B2
Abstract:
PURPOSE: To energize only a measuring channel by providing a means for generating an information indicating a range in which a range setting unit is set, and a means receiving a range information, for energizing a switching circuit for a channel to which an turn-off range is set.
CONSTITUTION: Range information generating circuits 7a to 7c are provided respectively in channels, a source voltage VB from a battery 6 is applied through a switching element FET8 to a DC-DC converter 5, and a CPU 4 selectively controls turn-on and -off operation of switching circuits 3a to 3c for the channels. The CPU 4 receives a range information from each of the channel, at its input port IN, and detect a channel in which a range setting unit in a measuring system circuit is set in a range other than a turn-off range, and delivers a control signal for starting switching operation from its output port OUT to the switching circuit in this channel. The switching circuit becomes active if the control signal has a high level, and accordingly, the switching is started.
Inventors:
Tokukasa, Fumio
Application Number:
JP7440695A
Publication Date:
April 26, 2004
Filing Date:
March 07, 1995
Export Citation:
Assignee:
HIOKI EE CORP
International Classes:
G01D3/024; G01D21/00; G01R1/30; H02J1/00; H04B1/16; (IPC1-7): G01D21/00; G01D3/024; G01R1/30; H02J1/00
Attorney, Agent or Firm:
大原 拓也
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