JPH0230630U - - Google Patents
Info
- Publication number
- JPH0230630U JPH0230630U JP10764288U JP10764288U JPH0230630U JP H0230630 U JPH0230630 U JP H0230630U JP 10764288 U JP10764288 U JP 10764288U JP 10764288 U JP10764288 U JP 10764288U JP H0230630 U JPH0230630 U JP H0230630U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- voltage
- resistor
- output end
- capacitor
- 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 4
- 238000010586 diagram Methods 0.000 description 8
- 238000001514 detection method Methods 0.000 description 1
Landscapes
- Indexing, Searching, Synchronizing, And The Amount Of Synchronization Travel Of Record Carriers (AREA)
- Filters And Equalizers (AREA)
Description
第１図は本考案の一実施例のフイルタ回路を示
すブロツク図、第２図は第１図の具体的な回路図
、第３図は上記実施例を使用したモータの速度制
御回路の回路図、第４図は磁気記録再生装置のサ
ーボ回路を示すブロツク図、第５図は従来のフイ
ルタ回路の回路図、第６図は第５図の回路の入力
電圧に対する出力電圧の応答特性を示す波形図、
第７図は従来のバイアスを加えたフイルタ回路の
ブロツク図、第８図は第７図の実際の回路図、第
９図は第８図の回路の入力電圧に対する出力電圧
の応答特性を示す波形図である。
３１……入力端、３２……出力端、３４……電
圧検出回路、ＳＷ……スイツチ、Ｒ１〜Ｒ９……
抵抗、Ｃ……コンデンサ、Ｄ１，Ｄ２……ダイオ
ード、ＥＣ，ＥＤ……直流電源、Ｑ１，Ｑ２……
トランジスタ。
Fig. 1 is a block diagram showing a filter circuit according to an embodiment of the present invention, Fig. 2 is a specific circuit diagram of Fig. 1, and Fig. 3 is a circuit diagram of a motor speed control circuit using the above embodiment. , Fig. 4 is a block diagram showing a servo circuit of a magnetic recording/reproducing device, Fig. 5 is a circuit diagram of a conventional filter circuit, and Fig. 6 is a waveform showing the response characteristic of the output voltage to the input voltage of the circuit shown in Fig. 5. figure,
Figure 7 is a block diagram of a conventional filter circuit with bias added, Figure 8 is an actual circuit diagram of Figure 7, and Figure 9 is a waveform showing the response characteristics of the output voltage to the input voltage of the circuit in Figure 8. It is a diagram. 31...Input end, 32...Output end, 34...Voltage detection circuit, SW...Switch, R1 to R9 ...
Resistor, C...Capacitor, D1 , D2 ...Diode, EC, ED...DC power supply, Q1 , Q2 ...
transistor.
Claims (1)
と、前記出力端に接続された第２の抵抗とコンデ
ンサとの直列回路と、前記コンデンサの前記出力
端とは反対側の電極に入力電圧の極性と同一極性
の直流バイアス電圧を供給するバイアス電圧源と
を有したフイルタ回路において、前記第２の抵抗
とコンデンサとの接続点に、その点の電圧を一定
範囲に抑制する電圧制限回路を設けたことを特徴
とするフイルタ回路。 A series circuit of a first resistor connected between an input end and an output end, a second resistor and a capacitor connected to the output end, and an electrode of the capacitor opposite to the output end. In a filter circuit having a bias voltage source that supplies a DC bias voltage of the same polarity as the input voltage, a voltage limiter is provided at a connection point between the second resistor and the capacitor to suppress the voltage at that point within a certain range. A filter circuit characterized by being provided with a circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10764288U JPH0230630U (en) | 1988-08-17 | 1988-08-17 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10764288U JPH0230630U (en) | 1988-08-17 | 1988-08-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0230630U true JPH0230630U (en) | 1990-02-27 |
Family
ID=31342241
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10764288U Pending JPH0230630U (en) | 1988-08-17 | 1988-08-17 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0230630U (en) |
-
1988
- 1988-08-17 JP JP10764288U patent/JPH0230630U/ja active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS626656Y2 (en) | ||
| JPS59189495U (en) | current limit circuit | |
| JPS6115838U (en) | Transistor drive circuit | |
| JPH0320459U (en) | ||
| JPH01102941U (en) | ||
| JPS5985085U (en) | power circuit | |
| JPS61107134U (en) | ||
| JPS62125015U (en) | ||
| JPS62186530U (en) | ||
| JPS5843616U (en) | Recording bias oscillation circuit | |
| JPS6336905U (en) | ||
| JPS647427U (en) | ||
| JPS6157630U (en) | ||
| JPH0435205U (en) | ||
| JPS6213026U (en) | ||
| JPH01143300U (en) | ||
| JPS61149143U (en) | ||
| JPS6172743U (en) | ||
| JPS61111216U (en) | ||
| JPS645205U (en) | ||
| JPS5846171U (en) | Saturation voltage detection circuit | |
| JPS61176815U (en) | ||
| JPS586433U (en) | Pulse oscillation circuit | |
| JPS6162438U (en) | ||
| JPS6034620U (en) | Overcurrent protection circuit |