JPS5945572U - Load impedance detection circuit - Google Patents
Load impedance detection circuitInfo
- Publication number
- JPS5945572U JPS5945572U JP14241682U JP14241682U JPS5945572U JP S5945572 U JPS5945572 U JP S5945572U JP 14241682 U JP14241682 U JP 14241682U JP 14241682 U JP14241682 U JP 14241682U JP S5945572 U JPS5945572 U JP S5945572U
- Authority
- JP
- Japan
- Prior art keywords
- resistors
- connection point
- common connection
- load impedance
- emitter
- 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
Landscapes
- Measurement Of Resistance Or Impedance (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は本出願人が先に提案した回路の一例の回路図、
第２図は各負荷インピーダンスを接続した場合の５ＥＰ
Ｐ回路トランジスタのロニドライン、第３図は本考案回
路の一実施例の回路図である。
１・・・・・・インピーダンス検出信号出力端子、２・
・・・・・アンドゲート、Ａ２・・・・・・差動アンプ
、Ａ３・・・・・・電圧コンパレータ、Ｑ工＋ Ｑ２・
・・・・・５ＥＰＰ回路トランジスタ、Ｒ□、Ｒ２・・
・・・・エミッタ抵抗、Ｒ３，Ｒ４Ａ、Ｒ２Ｂ。
Ｒ６，Ｒ７・・・・・・抵抗、Ｒ３・・・・・・電源、
Ｒ工・・・・・・負荷インピーダンスFigure 1 is a circuit diagram of an example of the circuit proposed earlier by the applicant.
Figure 2 shows 5EP when each load impedance is connected.
FIG. 3 is a circuit diagram of an embodiment of the circuit of the present invention. 1... Impedance detection signal output terminal, 2.
...And gate, A2...Differential amplifier, A3...Voltage comparator, Q engineering + Q2.
...5EPP circuit transistor, R□, R2...
...Emitter resistance, R3, R4A, R2B. R6, R7...Resistance, R3...Power supply,
R work...Load impedance
Claims (1)
ミッタが夫々のエミッタ抵抗蕃介して共通に接続され、
かつ、該エミッタ抵抗の共通接続点とアースとの間に負
荷インピーダンスが接続されてなるコンプリメンタリ５
ＥＰＰ回路の該負荷インピーダンスを検出する回路にお
いて、該ＮＰＮ ）ランジスタ又はＰＮＰ）ランジース
タのエミッタとアース−との間に夫々直列に接続された
第１及び第２の抵抗と、該第１及び第２の抵抗の共通接
続点に一方の入力端子が接続され、かつ、該エミッタ抵
抗の共通接続点に他方の入力端子が接続された差動増幅
器と、該エミッタ抵抗の共通接続点に取り出された出力
電圧の正方向又は負方向のみの絶対側が所定電圧以下の
時のみ出力信号を出力する電圧コンパレータと、該差動
増幅器の出力と該電圧コノパレータの出力とを供給され
るアンドゲートとよりなり、該エミッタ抵抗の共通接続
点と該第１及び第２の抵抗の共通接続点との間の電位差
を検出して得た該負荷インピーダンスの検出信号を該ア
ンドゲートより取り出すよう構成してなる負荷インピー
ダンス検出回路。The emitters of the NPN ) transistor and the PNP transistor are commonly connected through their respective emitter resistors,
and a complementary 5 in which a load impedance is connected between the common connection point of the emitter resistors and the ground.
A circuit for detecting the load impedance of an EPP circuit includes first and second resistors connected in series between the emitter of the NPN transistor or the PNP transistor and the ground, respectively; A differential amplifier having one input terminal connected to a common connection point of the resistors, and the other input terminal connected to a common connection point of the emitter resistors, and an output taken out to the common connection point of the emitter resistors. It consists of a voltage comparator that outputs an output signal only when the absolute side of only the positive or negative direction of the voltage is below a predetermined voltage, and an AND gate that is supplied with the output of the differential amplifier and the output of the voltage conoparator, and Load impedance detection configured to extract a detection signal of the load impedance obtained by detecting a potential difference between a common connection point of the emitter resistor and a common connection point of the first and second resistors from the AND gate. circuit.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14241682U JPS5945572U (en) | 1982-09-20 | 1982-09-20 | Load impedance detection circuit |
| GB08308583A GB2119102B (en) | 1982-04-01 | 1983-03-29 | Load impedance detector for audio power amplifiers |
| DE3311955A DE3311955C2 (en) | 1982-04-01 | 1983-03-31 | Load impedance detector |
| US06/480,927 US4549147A (en) | 1982-04-01 | 1983-03-31 | Load impedance detector for audio power amplifiers |
| FR8305307A FR2524756B1 (en) | 1982-04-01 | 1983-03-31 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14241682U JPS5945572U (en) | 1982-09-20 | 1982-09-20 | Load impedance detection circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5945572U true JPS5945572U (en) | 1984-03-26 |
| JPH0316066Y2 JPH0316066Y2 (en) | 1991-04-08 |
Family
ID=30318225
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14241682U Granted JPS5945572U (en) | 1982-04-01 | 1982-09-20 | Load impedance detection circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5945572U (en) |
-
1982
- 1982-09-20 JP JP14241682U patent/JPS5945572U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0316066Y2 (en) | 1991-04-08 |
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