JPH02147952U - - Google Patents
Info
- Publication number
- JPH02147952U JPH02147952U JP5785589U JP5785589U JPH02147952U JP H02147952 U JPH02147952 U JP H02147952U JP 5785589 U JP5785589 U JP 5785589U JP 5785589 U JP5785589 U JP 5785589U JP H02147952 U JPH02147952 U JP H02147952U
- Authority
- JP
- Japan
- Prior art keywords
- signal
- pass filter
- low
- circuit
- frequency
- 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
- 230000010355 oscillation Effects 0.000 claims description 3
- 239000003990 capacitor Substances 0.000 claims 2
- 238000001514 detection method Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 5
Landscapes
- Networks Using Active Elements (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Description
第１図は本考案の一実施例のブロツク図、第２
図は本実施例を説明する波形図、第３図ａ，ｂは
第１図の要部であるジヤイレータフイルタの回路
図とブロツク図、第４図は従来の低域通過フイル
タの回路図である。
１０１……高周波増幅器、１０２Ａ，Ｂ……ミ
キサ回路、１０３……低域通過フイルタ、１０４
……リミツタ回路、１０５……復調回路、１０６
……低域通過フイルタ、１０７……コンバレータ
回路、１０８……９０度移相器、１０９……局部
発振回路。
Figure 1 is a block diagram of one embodiment of the present invention;
The figure is a waveform diagram for explaining this embodiment, Figures 3a and 3b are a circuit diagram and block diagram of a gyrator filter, which is the main part of Figure 1, and Figure 4 is a circuit diagram of a conventional low-pass filter. It is. 101...High frequency amplifier, 102A, B...Mixer circuit, 103...Low pass filter, 104
... Limiter circuit, 105 ... Demodulation circuit, 106
...Low-pass filter, 107...Converter circuit, 108...90 degree phase shifter, 109...Local oscillation circuit.
Claims (1)
受信するＦＳＫ受信機において、局部発振回路に
より出力される回線の受信信号の周波数と同一の
局部発振周波数を用いてミキサ回路によりベース
バンド信号を生成し、前記ベースバンド信号を入
力信号とする低域通過フイルタを有し、前記低域
通過フイルタが少なくとも４個のトランスコンダ
クタンス・アンプ及び１個のコンデンサからなる
ジヤイレータ回路と少なくとも１個のコンデンサ
とで構成され、前記低域通過フイルタの出力信号
から復調信号を得る直交検波復調回路を有するこ
とを特徴とするＦＳＫ受信機。 In an FSK receiver that receives a modulated wave frequency-modulated with a binary digital signal, a baseband signal is generated by a mixer circuit using the same local oscillation frequency as the frequency of the line reception signal output by the local oscillation circuit. , a low-pass filter that receives the baseband signal as an input signal, and the low-pass filter is composed of a gyrator circuit including at least four transconductance amplifiers and one capacitor, and at least one capacitor. An FSK receiver comprising: a quadrature detection demodulation circuit that obtains a demodulated signal from the output signal of the low-pass filter.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989057855U JPH0810980Y2 (en) | 1989-05-18 | 1989-05-18 | FSK receiver |
| CA002014916A CA2014916C (en) | 1989-04-20 | 1990-04-19 | Direct conversion receiver with dithering local carrier frequency for detecting transmitted carrier frequency |
| US07/511,696 US5091921A (en) | 1989-04-20 | 1990-04-20 | Direct conversion receiver with dithering local carrier frequency for detecting transmitted carrier frequency |
| AU53753/90A AU624707B2 (en) | 1989-04-20 | 1990-04-20 | Direct conversion receiver with dithering local carrier frequency for detecting transmitted carrier frequency |
| EP90304265A EP0394064B1 (en) | 1989-04-20 | 1990-04-20 | Direct conversion receiver with dithering local carrier frequency for detecting transmitted carrier frequency |
| DE69030838T DE69030838T2 (en) | 1989-04-20 | 1990-04-20 | Direct mix receiver with local carrier jitter frequency for the transmitted carrier frequency detection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989057855U JPH0810980Y2 (en) | 1989-05-18 | 1989-05-18 | FSK receiver |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02147952U true JPH02147952U (en) | 1990-12-17 |
| JPH0810980Y2 JPH0810980Y2 (en) | 1996-03-29 |
Family
ID=31582941
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1989057855U Expired - Lifetime JPH0810980Y2 (en) | 1989-04-20 | 1989-05-18 | FSK receiver |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0810980Y2 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59144953U (en) * | 1983-03-17 | 1984-09-27 | 日本電気株式会社 | Frequency shift keying signal receiver |
| JPS6210914A (en) * | 1985-07-08 | 1987-01-19 | Tokyo Denshi Yakin Kenkyusho:Kk | Synthesized reactance device |
-
1989
- 1989-05-18 JP JP1989057855U patent/JPH0810980Y2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59144953U (en) * | 1983-03-17 | 1984-09-27 | 日本電気株式会社 | Frequency shift keying signal receiver |
| JPS6210914A (en) * | 1985-07-08 | 1987-01-19 | Tokyo Denshi Yakin Kenkyusho:Kk | Synthesized reactance device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0810980Y2 (en) | 1996-03-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| USRE45443E1 (en) | Radio receiver | |
| JP2861631B2 (en) | FSK receiver | |
| JPH02147952U (en) | ||
| JP4260367B2 (en) | Demodulator circuit | |
| JPH0324740U (en) | ||
| JPH0463574B2 (en) | ||
| JP2743635B2 (en) | Signal receiver | |
| JPH0127301Y2 (en) | ||
| JPH073742Y2 (en) | Transceiver | |
| JPH01129911U (en) | ||
| JPS58111535U (en) | FM receiver | |
| JPS5931075Y2 (en) | Transmission/reception circuit | |
| JPS61206333U (en) | ||
| JPS63118580U (en) | ||
| JPH0324705U (en) | ||
| JPH0380383U (en) | ||
| JPH0993293A (en) | Radio receiver | |
| JPS633636U (en) | ||
| JPS61173534A (en) | Am receiver | |
| JPH028499B2 (en) | ||
| JPH01126642U (en) | ||
| JPH09214572A (en) | Fm signal demodulation circuit | |
| JPS6181236U (en) | ||
| JPS6247245U (en) | ||
| JPH0637820A (en) | FSK data receiver |