JPH0243009U - - Google Patents
Info
- Publication number
- JPH0243009U JPH0243009U JP12058588U JP12058588U JPH0243009U JP H0243009 U JPH0243009 U JP H0243009U JP 12058588 U JP12058588 U JP 12058588U JP 12058588 U JP12058588 U JP 12058588U JP H0243009 U JPH0243009 U JP H0243009U
- Authority
- JP
- Japan
- Prior art keywords
- signal
- clock signal
- switched capacitor
- capacitor filter
- inputting
- 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
Landscapes
- Amplitude Modulation (AREA)
Description
第１図はこの考案の一実施例に係るＦＭ信号の
復調回路の回路図、第２図は第１図中のスイツチ
ドキヤパシタフイルタの利得−周波数特性を示す
線図、第３図はこの考案の他の実施例に係るＦＭ
信号の復調回路の回路図、第４図は第１図中のス
イツチドキヤパシタフイルタの利得−周波数特性
を示す線図である。
主な符号の説明、１０：波形整形回路、１２，
３０：スイツチドキヤパシタフイルタ、１４，３
２：発振器、２０：ＡＭ復調手段。
Fig. 1 is a circuit diagram of an FM signal demodulation circuit according to an embodiment of this invention, Fig. 2 is a diagram showing the gain-frequency characteristics of the switched capacitor filter in Fig. 1, and Fig. 3 is a diagram showing the gain-frequency characteristics of the switched capacitor filter in Fig. 1. FM according to other embodiments of the invention
FIG. 4, which is a circuit diagram of a signal demodulation circuit, is a diagram showing the gain-frequency characteristics of the switched capacitor filter shown in FIG. Explanation of main symbols, 10: Waveform shaping circuit, 12,
30: Switched capacitor filter, 14,3
2: Oscillator, 20: AM demodulation means.
Claims (1)
整形手段と、 波形整形後のＦＭ信号をクロツク信号として入
力し、クロツク信号の周波数に応じてカツトオフ
周波数を可変するスイツチドキヤパシタフイルタ
と、 所定周波数の発振信号を発生し、スイツチドキ
ヤパシタフイルタに通過信号として入力する発振
信号発生手段と、 スイツチドキヤパシタフイルタの出力をＡＭ復
調するＡＭ復調手段と、 を備えたことを特徴とするＦＭ信号の復調回路
。 (2) 所定周波数のクロツク信号を発生するクロ
ツク信号発生手段と、 クロツク信号発生手段の出力するクロツク信号
を入力してカツトオフ周波数の設定を行い、ＦＭ
信号を通過信号として入力するスイツチドキヤパ
シタフイルタと、 スイツチドキヤパシタフイルタの出力をＡＭ復
調するＡＭ復調手段と、 を備えたことを特徴とするＦＭ信号の復調回路
。[Claims for Utility Model Registration] (1) Waveform shaping means for shaping an FM signal into a square wave signal, inputting the FM signal after waveform shaping as a clock signal, and varying the cutoff frequency according to the frequency of the clock signal. oscillation signal generating means for generating an oscillation signal of a predetermined frequency and inputting it as a pass signal to the switched capacitor filter; and AM demodulating means for AM demodulating the output of the switched capacitor filter; An FM signal demodulation circuit comprising: (2) A clock signal generation means that generates a clock signal of a predetermined frequency, and a cutoff frequency is set by inputting the clock signal output from the clock signal generation means, and the FM
An FM signal demodulation circuit comprising: a switched capacitor filter that inputs a signal as a passing signal; and an AM demodulator that demodulates the output of the switched capacitor filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12058588U JPH0243009U (en) | 1988-09-14 | 1988-09-14 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12058588U JPH0243009U (en) | 1988-09-14 | 1988-09-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0243009U true JPH0243009U (en) | 1990-03-26 |
Family
ID=31366830
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12058588U Pending JPH0243009U (en) | 1988-09-14 | 1988-09-14 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0243009U (en) |
-
1988
- 1988-09-14 JP JP12058588U patent/JPH0243009U/ja active Pending