JPH0286211U - - Google Patents
Info
- Publication number
- JPH0286211U JPH0286211U JP16646788U JP16646788U JPH0286211U JP H0286211 U JPH0286211 U JP H0286211U JP 16646788 U JP16646788 U JP 16646788U JP 16646788 U JP16646788 U JP 16646788U JP H0286211 U JPH0286211 U JP H0286211U
- Authority
- JP
- Japan
- Prior art keywords
- current
- power amplifier
- control transistor
- detection circuit
- flowing
- 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
- 238000001514 detection method Methods 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Amplifiers (AREA)
Description
第１図は本考案を適用したＤ級電力増幅器の最
適負荷検出回路の実施例を示す回路図、第２図は
従来の回路図、第３図および第４図はＡ点におけ
る電圧と電流を説明する図である。
１……検知出力端子、Ｔｒ……トランス、Ｑ１
，Ｑ２……電圧制御トランジスタ、Ｄ１，Ｄ２，
Ｄ３，Ｄ４……ダイオード、ＣＴ……電流トラン
ス、Ｃ，Ｌ，ＲＬ……外部負荷、Ａ……出力点、
Ｅ……矩形波電圧、ｉ……正弦波電流、ｉｏ１，
ｉｏ２……余剰電流。
Fig. 1 is a circuit diagram showing an embodiment of the optimum load detection circuit for a class D power amplifier to which the present invention is applied, Fig. 2 is a conventional circuit diagram, and Figs. 3 and 4 show the voltage and current at point A. FIG. 1...Detection output terminal, Tr...Transformer, Q1
, Q2... Voltage control transistor, D1, D2,
D3, D4...Diode, CT...Current transformer, C, L, RL...External load, A...Output point,
E...Square wave voltage, i...Sine wave current, io1,
io2... Surplus current.
Claims (1)
により負荷電流を流す電力増幅器で、該パルス電
圧の位相と該負荷電流の位相とのずれによる逆方
向電流を該電圧制御トランジスタに流さないため
の保護回路、および該保護回路を流れる電流の検
知回路が設けられていることを特徴とするＤ級電
力増幅器の最適負荷検出回路。 A power amplifier that causes a load current to flow using a pulse voltage generated from a voltage control transistor, and a protection circuit that prevents a reverse current from flowing through the voltage control transistor due to a phase difference between the pulse voltage and the load current; An optimal load detection circuit for a class D power amplifier, comprising a detection circuit for detecting a current flowing through a protection circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16646788U JPH0286211U (en) | 1988-12-22 | 1988-12-22 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16646788U JPH0286211U (en) | 1988-12-22 | 1988-12-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0286211U true JPH0286211U (en) | 1990-07-09 |
Family
ID=31453873
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16646788U Pending JPH0286211U (en) | 1988-12-22 | 1988-12-22 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0286211U (en) |
-
1988
- 1988-12-22 JP JP16646788U patent/JPH0286211U/ja active Pending
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