JPH02140614U - - Google Patents
Info
- Publication number
- JPH02140614U JPH02140614U JP4852089U JP4852089U JPH02140614U JP H02140614 U JPH02140614 U JP H02140614U JP 4852089 U JP4852089 U JP 4852089U JP 4852089 U JP4852089 U JP 4852089U JP H02140614 U JPH02140614 U JP H02140614U
- Authority
- JP
- Japan
- Prior art keywords
- output signal
- control circuit
- detects
- timer control
- signal
- 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
- 230000005856 abnormality Effects 0.000 claims 1
- 238000011109 contamination Methods 0.000 claims 1
- 238000001514 detection method Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Television Signal Processing For Recording (AREA)
Description
第１図は本考案の実施例を示すブロツク線図、
第２図は同実施例の動作波形図である。
１は前置増幅器、２はイコライザ増幅器、３は
エンベロープ検波器、４はコンパレータ、５はタ
イマーコントロール回路、６は表示部である。
FIG. 1 is a block diagram showing an embodiment of the present invention;
FIG. 2 is an operational waveform diagram of the same embodiment. 1 is a preamplifier, 2 is an equalizer amplifier, 3 is an envelope detector, 4 is a comparator, 5 is a timer control circuit, and 6 is a display section.
Claims (1)
生ＦＭ信号を増幅する前置増幅器と同前置増幅器
出力信号の周波数特性を補正するイコライザ増幅
器と、同イコライザ増幅器出力信号を検波するエ
ンベロープ検波器と、同エンベロープ検波器出力
信号と予め設定した基準電圧値とを比較するコン
パレータ回路と、同コンパレータ回路出力信号の
同基準電圧以下の期間をカウントするタイマーコ
ントロール回路と、同タイマーコントロール回路
出力信号により再生信号の異常を知らせる表示部
からなるシリンダヘツド汚れ検知装置。 A preamplifier that amplifies the reproduced FM signal from the video head of a video tape recorder, an equalizer amplifier that corrects the frequency characteristics of the output signal of the preamplifier, an envelope detector that detects the output signal of the equalizer amplifier, and an envelope detector that detects the output signal of the equalizer amplifier. A comparator circuit that compares the device output signal with a preset reference voltage value, a timer control circuit that counts the period when the output signal of the comparator circuit is below the same reference voltage, and a timer control circuit that detects abnormalities in the reproduced signal using the output signal of the timer control circuit. Cylinder head contamination detection device consisting of a display section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4852089U JPH02140614U (en) | 1989-04-24 | 1989-04-24 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4852089U JPH02140614U (en) | 1989-04-24 | 1989-04-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02140614U true JPH02140614U (en) | 1990-11-26 |
Family
ID=31565399
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4852089U Pending JPH02140614U (en) | 1989-04-24 | 1989-04-24 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02140614U (en) |
-
1989
- 1989-04-24 JP JP4852089U patent/JPH02140614U/ja active Pending