JPH0161835U - - Google Patents
Info
- Publication number
- JPH0161835U JPH0161835U JP15721487U JP15721487U JPH0161835U JP H0161835 U JPH0161835 U JP H0161835U JP 15721487 U JP15721487 U JP 15721487U JP 15721487 U JP15721487 U JP 15721487U JP H0161835 U JPH0161835 U JP H0161835U
- Authority
- JP
- Japan
- Prior art keywords
- power supply
- circuit
- resistor
- diodes
- hum
- 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
Links
- 239000003990 capacitor Substances 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009499 grossing Methods 0.000 description 1
Landscapes
- Filters And Equalizers (AREA)
Description
第１図は本考案の一実施例における電源ハム音
軽減装置の回路図、第２図はトランジスタを使用
した従来例の回路図である。
Ｒ１……積分用抵抗、Ｃ１……平滑用コンデン
サ、Ｄ１〜Ｄ３……音声出力時の電流パス用ダイ
オード、１……音声出力ＩＣ。
FIG. 1 is a circuit diagram of a power supply hum reduction device according to an embodiment of the present invention, and FIG. 2 is a circuit diagram of a conventional example using transistors. R1 ... Integrating resistor, C1 ... Smoothing capacitor, D1 to D3 ... Diode for current path during audio output, 1... Audio output IC.
Claims (1)
源供給にともなうハム音を軽減する電源ハム音軽
減回路であつて、抵抗とコンデンサとからなる積
分回路と、直列に接続された複数個のダイオード
とを有し、前記複数個のダイオードは前記抵抗に
並列に接続したことを特徴とする電源ハム音軽減
装置。 This is a power supply hum reduction circuit that reduces hum caused by power supply from a switching power supply circuit to an audio output circuit, and includes an integrating circuit consisting of a resistor and a capacitor, and a plurality of diodes connected in series. , wherein the plurality of diodes are connected in parallel to the resistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15721487U JPH0161835U (en) | 1987-10-14 | 1987-10-14 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15721487U JPH0161835U (en) | 1987-10-14 | 1987-10-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0161835U true JPH0161835U (en) | 1989-04-20 |
Family
ID=31436460
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15721487U Pending JPH0161835U (en) | 1987-10-14 | 1987-10-14 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0161835U (en) |
-
1987
- 1987-10-14 JP JP15721487U patent/JPH0161835U/ja active Pending
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