JPH03122372U - - Google Patents
Info
- Publication number
- JPH03122372U JPH03122372U JP3166390U JP3166390U JPH03122372U JP H03122372 U JPH03122372 U JP H03122372U JP 3166390 U JP3166390 U JP 3166390U JP 3166390 U JP3166390 U JP 3166390U JP H03122372 U JPH03122372 U JP H03122372U
- Authority
- JP
- Japan
- Prior art keywords
- diode
- resistor
- cathode side
- anode side
- anode
- 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
Description
第１図は本考案の入力入力保護回路、第２図は
従来の入力保護回路である。
１……第１の保護回路、２……第２の保護回路
、Ｄ１……第１のダイオード、Ｄ２……第２のダ
イオード、Ｄ３……第３のダイオード、Ｄ４……
第４のダイオード、Ｄ５……定電流ダイオード、
Ｒ１……第１の抵抗、Ｒ２……第２の抵抗、Ｒ３
……第３の抵抗、Ｖｓｕｐ……共通電源電圧、Ｖ
ｒｅｇ……増幅器の電源電圧。
FIG. 1 shows an input protection circuit according to the present invention, and FIG. 2 shows a conventional input protection circuit. 1...First protection circuit, 2...Second protection circuit, D1...First diode, D2...Second diode, D3...Third diode, D4...
Fourth diode, D5...constant current diode,
R1...first resistance, R2...second resistance, R3
...Third resistor, Vsup...Common power supply voltage, V
reg...Amplifier power supply voltage.
Claims (1)
幅器に加えるようにした回路において、 前記入力電圧を印加する入力端子にアノード側
を接続した第１のダイオードと、カソード側を接
続した第２のダイオードとを設け、前記第１のダ
イオードのカソード側を正の電位に接続し、前記
第２のダイオードのアノード側を負の電位に接続
した第１の保護回路と、 前記増幅器の入力端にアノード側を接続した第
３のダイオードとカソード側を接続した第４のダ
イオードとを設け、前記第３のダイオードのカソ
ード側を第２の抵抗を介して正の電位点に接続し
、前記第４のダイオードのアノード側を第３の抵
抗を介して負の電位に接続するとともに、前記第
３のダイオードのカソード側をアノードに、前記
第４のダイオードのアノード側をカソードに接続
した第５の定電流ダイオードを設けた第２の保護
回路と、 を有したことを特徴とした入力保護回路。[Claims for Utility Model Registration] In a circuit in which an input voltage is applied to an amplifier via a first resistor for voltage limiting, a first diode whose anode side is connected to an input terminal to which the input voltage is applied; , a second diode whose cathode side is connected, the cathode side of the first diode is connected to a positive potential, and the anode side of the second diode is connected to a negative potential. and a third diode whose anode side is connected to the input terminal of the amplifier and a fourth diode whose cathode side is connected to the input terminal of the amplifier, and the cathode side of the third diode is connected to a positive potential through a second resistor. the anode side of the fourth diode is connected to a negative potential via a third resistor, the cathode side of the third diode is connected to the anode, and the anode side of the fourth diode is connected to the negative potential through the third resistor. An input protection circuit comprising: a second protection circuit including a fifth constant current diode connected to the cathode;
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3166390U JPH0745024Y2 (en) | 1990-03-27 | 1990-03-27 | Input protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3166390U JPH0745024Y2 (en) | 1990-03-27 | 1990-03-27 | Input protection circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03122372U true JPH03122372U (en) | 1991-12-13 |
| JPH0745024Y2 JPH0745024Y2 (en) | 1995-10-11 |
Family
ID=31534457
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3166390U Expired - Lifetime JPH0745024Y2 (en) | 1990-03-27 | 1990-03-27 | Input protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0745024Y2 (en) |
-
1990
- 1990-03-27 JP JP3166390U patent/JPH0745024Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0745024Y2 (en) | 1995-10-11 |