Title:
INTEGRATED CIRCUIT FOR SOUND OUTPUT
Document Type and Number:
Japanese Patent JP3389334
Kind Code:
B2
Abstract:
PURPOSE: To obtain a sound outputting integrated circuit capable of preventing the deterioration of a distortion ratio and the generation of a practical problem even at the time of using low power supply voltage by controlling the level of a sound line output so as not to exceed a prescribed level.
CONSTITUTION: When a sound signal is inputted to the base of a transistor(TR) T9, its base potential is made higher than the base potential of a TR T8, the conductive quantity of the TR T9 is increased and that of the TR T8 is reduced. Since the ratio of currents flowing into TRs T6, T7 to currents flowing into the TRs T8, T9 are changed in accordance with the level of an AGC detection input to a differential pair 34, a difference between the collector currents of TRs T12, T13 is allowed to flow into a reference circuit 44 through a resistor R5, so that a sound line signal is outputted.
More Like This:
| JPH10200348 | AMPLIFIER CIRCUIT |
Inventors:
Nobuyoshi Hayashi
Application Number:
JP14926494A
Publication Date:
March 24, 2003
Filing Date:
June 30, 1994
Export Citation:
Assignee:
Sanyo Electric Co., Ltd.
International Classes:
H03G3/30; H03F3/45; H03G5/16; H03G7/04; H03G11/00; (IPC1-7): H03G7/04; H03F3/45; H03G3/30; H03G11/00
Domestic Patent References:
| JP3250458A | ||||
| JP60174508A | ||||
| JP373042U | ||||
| JP60150864U |
Attorney, Agent or Firm:
Yoshito Yamada
Previous Patent: CONNECTING SECTION FOR POWER CABLE
Next Patent: SHEET-SHAPED WORKPIECE TRANSFERRING DEVICE
Next Patent: SHEET-SHAPED WORKPIECE TRANSFERRING DEVICE