Title:
ELECTRONIC DEVICE WITH SOLAR BATTERY
Document Type and Number:
Japanese Patent JPS6041268
Kind Code:
A
Abstract:
PURPOSE:To enhance the practical use in an electronic device with a solar battery having sound generating function by driving a sound generator drive circuit by excess power at high illumination time. CONSTITUTION:In an electronic device with a solar battery for a portable calculator, an LSI circuit 1 is driven through a series resistor 3 by a solar battery power source 2. A sound generator drive circuit 8 is contained in the circuit 1, and electric power is supplied through a constant-voltage element 9 from the power souce 2. When excess power of the necessary operation power or higher is generated except the sound generating function at the high illumination time, a sound generating mechanism is operated. The mechanism is not operated by the element 9 at the low illumination time, thereby preventing the power source voltage from decreasing to prevent the erroneous operation.
Inventors:
HARUBE MITSUO
Application Number:
JP15080383A
Publication Date:
March 04, 1985
Filing Date:
August 17, 1983
Export Citation:
Assignee:
SHARP KK
International Classes:
H01L31/04; H01L31/02; (IPC1-7): H01L31/04
Attorney, Agent or Firm:
Sugiyama Takeshi