JPS5644289A - Signal receiver - Google Patents
Signal receiverInfo
- Publication number
- JPS5644289A JPS5644289A JP12136779A JP12136779A JPS5644289A JP S5644289 A JPS5644289 A JP S5644289A JP 12136779 A JP12136779 A JP 12136779A JP 12136779 A JP12136779 A JP 12136779A JP S5644289 A JPS5644289 A JP S5644289A
- Authority
- JP
- Japan
- Prior art keywords
- output
- gain
- circuit
- voltage
- filter
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q1/00—Details of selecting apparatus or arrangements
- H04Q1/18—Electrical details
- H04Q1/30—Signalling arrangements; Manipulation of signalling currents
- H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Abstract
PURPOSE:To improve the electric characteristic of a unit, by setting the maximum output voltage of the first rectifying circuit between the maximum output voltage of the second rectifying circuit and the DC bias voltage in the suppression type signal receiver used in the in-band single frequency signal system. CONSTITUTION:Differential and integral amplifying circuit 10 has a feedback system and sets the gain to a value lower than the gain of the IF in the low frequency and the high frequency of the sound band, and the output of circuit 10 is sent to active band-pass filter 20. The output of filter 20 is rectified in 30, and the input and the output of filter 20 are subjected to summing amplification by voltage adding circuit 40, and the gain for the output signal of filter 20 in the centre frequency is so set that the gain above may be lower than the gain for the input signal by voltage gain components of filter 20. The output is rectified by rectifying circuit 50, and a constsnt DC bias voltage is applied to this rectified output, and output voltages of circuits 30 and 50 are compared with each other in 60, and the maximum output voltage of circuit 30 is set between the maximum output voltage of circuit 50 and the DC bias voltage, thus improving the electric characteristic of the unit.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12136779A JPS5644289A (en) | 1979-09-20 | 1979-09-20 | Signal receiver |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12136779A JPS5644289A (en) | 1979-09-20 | 1979-09-20 | Signal receiver |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5644289A true JPS5644289A (en) | 1981-04-23 |
Family
ID=14809484
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12136779A Pending JPS5644289A (en) | 1979-09-20 | 1979-09-20 | Signal receiver |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5644289A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6172495A (en) * | 1984-09-18 | 1986-04-14 | Nippon Telegr & Teleph Corp <Ntt> | Signal receiver |
JPS63250932A (en) * | 1987-03-31 | 1988-10-18 | シーメンス・ニックスドルフ・インフォメーションシステム・アクチェンゲゼルシャフト | Circuit system for double-voice and multifrequency signal detection in telephone equipment |
-
1979
- 1979-09-20 JP JP12136779A patent/JPS5644289A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6172495A (en) * | 1984-09-18 | 1986-04-14 | Nippon Telegr & Teleph Corp <Ntt> | Signal receiver |
JPS63250932A (en) * | 1987-03-31 | 1988-10-18 | シーメンス・ニックスドルフ・インフォメーションシステム・アクチェンゲゼルシャフト | Circuit system for double-voice and multifrequency signal detection in telephone equipment |
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