JPS6444153A - Demodulator - Google Patents
DemodulatorInfo
- Publication number
- JPS6444153A JPS6444153A JP19997687A JP19997687A JPS6444153A JP S6444153 A JPS6444153 A JP S6444153A JP 19997687 A JP19997687 A JP 19997687A JP 19997687 A JP19997687 A JP 19997687A JP S6444153 A JPS6444153 A JP S6444153A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- phase
- pll
- burst wave
- demodulated
- 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
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Abstract
PURPOSE:To attain high speed locking even to a burst wave or the like and to attain digital/LSI configuration by constituting a carrier recovery circuit by a PLL. CONSTITUTION:A modulation reception signal SREC and a reference carrier SCR from a fed back variable oscillation circuit 10 are mixed by a multiplier circuit 1 and demodulated by a demodulation circuit 2. The demodulated signal is subject to band limit by a band pass filter 3 and phase-locked by a PLL circuit in a carrier recovery circuit 4. In this case, since a phase rotation circuit 5 and a phase error detection circuit 6 act like a phase comparator, they have excellent response and excellent tracking performance to a burst wave or the like. Moreover, an AFC 9 is operated based on the phase error of the recovery output SOUT from the circuit 4 to suppress the frequency fluctuation.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP19997687A JPS6444153A (en) | 1987-08-12 | 1987-08-12 | Demodulator |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP19997687A JPS6444153A (en) | 1987-08-12 | 1987-08-12 | Demodulator |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6444153A true JPS6444153A (en) | 1989-02-16 |
Family
ID=16416717
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP19997687A Pending JPS6444153A (en) | 1987-08-12 | 1987-08-12 | Demodulator |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6444153A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03139941A (en) * | 1989-10-25 | 1991-06-14 | Nec Corp | Frequency-modulated wave receiving equipment |
JPH03244247A (en) * | 1990-02-22 | 1991-10-31 | Sharp Corp | Afc circuit |
KR100286007B1 (en) * | 1993-03-31 | 2001-04-16 | 윤종용 | Digital demodulator |
JP2009246998A (en) * | 2001-01-09 | 2009-10-22 | Qualcomm Inc | Apparatus and method for calibrating frequency of local oscillator in wireless communications |
-
1987
- 1987-08-12 JP JP19997687A patent/JPS6444153A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03139941A (en) * | 1989-10-25 | 1991-06-14 | Nec Corp | Frequency-modulated wave receiving equipment |
JPH03244247A (en) * | 1990-02-22 | 1991-10-31 | Sharp Corp | Afc circuit |
KR100286007B1 (en) * | 1993-03-31 | 2001-04-16 | 윤종용 | Digital demodulator |
JP2009246998A (en) * | 2001-01-09 | 2009-10-22 | Qualcomm Inc | Apparatus and method for calibrating frequency of local oscillator in wireless communications |
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