JPH0243387B2 - - Google Patents
Info
- Publication number
- JPH0243387B2 JPH0243387B2 JP63152450A JP15245088A JPH0243387B2 JP H0243387 B2 JPH0243387 B2 JP H0243387B2 JP 63152450 A JP63152450 A JP 63152450A JP 15245088 A JP15245088 A JP 15245088A JP H0243387 B2 JPH0243387 B2 JP H0243387B2
- Authority
- JP
- Japan
- Prior art keywords
- transistor
- collector
- transistors
- current source
- base
- 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.)
- Expired - Lifetime
Links
- 239000003990 capacitor Substances 0.000 claims description 7
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 230000003071 parasitic effect Effects 0.000 description 2
- 230000010354 integration Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
- H04L27/22—Demodulator circuits; Receiver circuits
- H04L27/227—Demodulator circuits; Receiver circuits using coherent demodulation
- H04L27/2271—Demodulator circuits; Receiver circuits using coherent demodulation wherein the carrier recovery circuit uses only the demodulated signals
- H04L27/2273—Demodulator circuits; Receiver circuits using coherent demodulation wherein the carrier recovery circuit uses only the demodulated signals associated with quadrature demodulation, e.g. Costas loop
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
- H04L27/20—Modulator circuits; Transmitter circuits
- H04L27/2032—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner
- H04L27/2053—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner using more than one carrier, e.g. carriers with different phases
- H04L27/206—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner using more than one carrier, e.g. carriers with different phases using a pair of orthogonal carriers, e.g. quadrature carriers
- H04L27/2067—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner using more than one carrier, e.g. carriers with different phases using a pair of orthogonal carriers, e.g. quadrature carriers with more than two phase states
- H04L27/2071—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner using more than one carrier, e.g. carriers with different phases using a pair of orthogonal carriers, e.g. quadrature carriers with more than two phase states in which the data are represented by the carrier phase, e.g. systems with differential coding
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Circuits Of Receivers In General (AREA)
- Amplifiers (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
- Detection And Prevention Of Errors In Transmission (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8024802A FR2494938A1 (fr) | 1980-11-21 | 1980-11-21 | Procede de transmission des signaux d'exploitation d'un faisceau hertzien numerique, emetteur et recepteur pour la mise en oeuvre d'un tel procede |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6446352A JPS6446352A (en) | 1989-02-20 |
| JPH0243387B2 true JPH0243387B2 (US08118993-20120221-C00002.png) | 1990-09-28 |
Family
ID=9248249
Family Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56185596A Pending JPS57112160A (en) | 1980-11-21 | 1981-11-20 | Transmitter and receiver for processing for transmitting service signal for digital radio beam |
| JP63152450A Granted JPS6446352A (en) | 1980-11-21 | 1985-07-17 | Service signal transmitter in digital radio line |
| JP63152451A Granted JPS6446353A (en) | 1980-11-21 | 1986-07-07 | Service signal receiver in digital radio line |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56185596A Pending JPS57112160A (en) | 1980-11-21 | 1981-11-20 | Transmitter and receiver for processing for transmitting service signal for digital radio beam |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63152451A Granted JPS6446353A (en) | 1980-11-21 | 1986-07-07 | Service signal receiver in digital radio line |
Country Status (5)
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5066957A (en) * | 1989-04-21 | 1991-11-19 | Kokusai Denshin Denwa Co., Ltd. | Hybrid modulation satellite communication system |
| GB2307152B (en) * | 1995-11-10 | 1999-04-07 | Motorola Ltd | Method and apparatus for enhanced communication capability while maintaining standard channel modulation compatibility |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5147311A (en) * | 1974-10-22 | 1976-04-22 | Fujitsu Ltd | Ai araamuhensohoshiki |
-
1980
- 1980-11-21 FR FR8024802A patent/FR2494938A1/fr active Granted
-
1981
- 1981-10-16 EP EP81401635A patent/EP0053051B1/fr not_active Expired
- 1981-10-16 DE DE8181401635T patent/DE3168370D1/de not_active Expired
- 1981-11-06 US US06/318,797 patent/US4426711A/en not_active Expired - Fee Related
- 1981-11-20 JP JP56185596A patent/JPS57112160A/ja active Pending
-
1985
- 1985-07-17 JP JP63152450A patent/JPS6446352A/ja active Granted
-
1986
- 1986-07-07 JP JP63152451A patent/JPS6446353A/ja active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57112160A (en) | 1982-07-13 |
| FR2494938A1 (fr) | 1982-05-28 |
| JPS6446353A (en) | 1989-02-20 |
| EP0053051B1 (fr) | 1985-01-16 |
| DE3168370D1 (en) | 1985-02-28 |
| US4426711A (en) | 1984-01-17 |
| EP0053051A1 (fr) | 1982-06-02 |
| JPH0243388B2 (US08118993-20120221-C00002.png) | 1990-09-28 |
| JPS6446352A (en) | 1989-02-20 |
| FR2494938B1 (US08118993-20120221-C00002.png) | 1984-03-02 |
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