JPS63185311U - - Google Patents
Info
- Publication number
- JPS63185311U JPS63185311U JP7655687U JP7655687U JPS63185311U JP S63185311 U JPS63185311 U JP S63185311U JP 7655687 U JP7655687 U JP 7655687U JP 7655687 U JP7655687 U JP 7655687U JP S63185311 U JPS63185311 U JP S63185311U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- supply voltage
- power
- detection circuit
- receives
- 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
Links
- 238000001514 detection method Methods 0.000 claims description 8
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
- Amplifiers (AREA)
Description
第１図は本考案の車載用オーデイオ装置の要部
を示すブロツク図、第２図は本考案の実施例とし
ての車載用オーデイオ装置の要部を示す回路図、
第３図及び第４図は本考案の動作説明図である。
１……オーデイオ装置、２……ミユーテイング
制御回路、３……バツテリ、４……イグニツシヨ
ンキースイツチ、５……負荷、６……電位差設定
回路、７……時定数回路、８……バツテリー供給
電圧急減検出回路、１０……ミユーテイングトリ
ガ回路、１１……電圧降下検出回路、１２……電
源スイツチ投入検出回路。
FIG. 1 is a block diagram showing the main parts of the in-vehicle audio device of the present invention, and FIG. 2 is a circuit diagram showing the main parts of the in-vehicle audio device as an embodiment of the invention.
3 and 4 are explanatory diagrams of the operation of the present invention. DESCRIPTION OF SYMBOLS 1... Audio device, 2... Muting control circuit, 3... Battery, 4... Ignition key switch, 5... Load, 6... Potential difference setting circuit, 7... Time constant circuit, 8... Battery Supply voltage sudden decrease detection circuit, 10... Muting trigger circuit, 11... Voltage drop detection circuit, 12... Power switch ON detection circuit.
Claims (1)
からの電力の供給を受けて作動する車載用オーデ
イオ装置において、 上記電源からの供給電圧に対し所要の電位差を
設定する電位差設定回路と、 上記電位差設定回路からの出力を受ける時定数
回路と、 該時定数回路からの出力および上記電源からの
供給電圧を受け上記供給電圧の所定値以上の急減
を検出する供給電圧急減検出回路と、 該供給電圧急減検出回路からの出力を受けミユ
ーテイング動作を行わせるミユーテイングトリガ
回路と、 上記電源からの供給電圧を受け該供給電圧が所
要の設定値以下になると上記ミユーテイングトリ
ガ回路を動作させるイネーブル信号を発生する電
圧降下検出回路と、 電源スイツチ投入時、上記電源からの供給電圧
が前記設定値以上になつても所定時間電圧検出回
路から前記イネーブル信号を出力させる電源スイ
ツチ投入検出回路を有することを特徴とする車載
用オーデイオ装置。[Scope of Utility Model Registration Claim] In an in-vehicle audio device that operates by receiving power from a power source via a power on/off switch in the electrical system, a required potential difference is set with respect to the voltage supplied from the power source. a potential difference setting circuit; a time constant circuit that receives an output from the potential difference setting circuit; and a sudden decrease in supply voltage that receives the output from the time constant circuit and the supply voltage from the power supply and detects a sudden decrease in the supply voltage that exceeds a predetermined value. a detection circuit; a mutating trigger circuit that receives an output from the supply voltage sudden decrease detection circuit to perform a muting operation; and a mutating trigger circuit that receives a supply voltage from the power supply and activates the mutating trigger circuit when the supply voltage falls below a required set value. a voltage drop detection circuit that generates an enable signal to operate the power switch; and a power switch turn-on detection circuit that causes the voltage detection circuit to output the enable signal for a predetermined period of time even if the supply voltage from the power source exceeds the set value when the power switch is turned on. An in-vehicle audio device characterized by having a circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987076556U JPH054333Y2 (en) | 1987-05-21 | 1987-05-21 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987076556U JPH054333Y2 (en) | 1987-05-21 | 1987-05-21 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63185311U true JPS63185311U (en) | 1988-11-29 |
| JPH054333Y2 JPH054333Y2 (en) | 1993-02-03 |
Family
ID=30923748
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987076556U Expired - Lifetime JPH054333Y2 (en) | 1987-05-21 | 1987-05-21 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH054333Y2 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS594209A (en) * | 1982-06-29 | 1984-01-11 | Matsushita Electric Ind Co Ltd | Muting circuit preventing shock sound |
| JPS6168516U (en) * | 1984-10-06 | 1986-05-10 |
-
1987
- 1987-05-21 JP JP1987076556U patent/JPH054333Y2/ja not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS594209A (en) * | 1982-06-29 | 1984-01-11 | Matsushita Electric Ind Co Ltd | Muting circuit preventing shock sound |
| JPS6168516U (en) * | 1984-10-06 | 1986-05-10 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH054333Y2 (en) | 1993-02-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| MY104199A (en) | Electrical supply control system for a motor vehicle | |
| JPS63185311U (en) | ||
| JPS62177108U (en) | ||
| JPH0178417U (en) | ||
| JPH0169338U (en) | ||
| JPH0211284U (en) | ||
| JPH0182632U (en) | ||
| JPH027736U (en) | ||
| JPH0223123U (en) | ||
| JPS6152439U (en) | ||
| JPS59134828U (en) | RAM storage device with backup function | |
| JPS6231545U (en) | ||
| JPH03124959U (en) | ||
| JPH02138322U (en) | ||
| JPS6194927U (en) | ||
| JPS62134136U (en) | ||
| JPS6270644U (en) | ||
| JPS6295962U (en) | ||
| JPH0453565U (en) | ||
| JPH0272640U (en) | ||
| JPS63175229U (en) | ||
| JPH01160530U (en) | ||
| JPH02115912A (en) | Power source application circuit | |
| JPH0185942U (en) | ||
| JPH03113523U (en) |