JPS5464960A - Carrier wave regenerator circuit - Google Patents

Carrier wave regenerator circuit

Info

Publication number
JPS5464960A
JPS5464960A JP13179277A JP13179277A JPS5464960A JP S5464960 A JPS5464960 A JP S5464960A JP 13179277 A JP13179277 A JP 13179277A JP 13179277 A JP13179277 A JP 13179277A JP S5464960 A JPS5464960 A JP S5464960A
Authority
JP
Japan
Prior art keywords
output
phase
add
sent
carrier wave
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
Application number
JP13179277A
Other languages
Japanese (ja)
Inventor
Kazuo Ogawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP13179277A priority Critical patent/JPS5464960A/en
Publication of JPS5464960A publication Critical patent/JPS5464960A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
    • H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
    • H04L27/38—Demodulator circuits; Receiver circuits
    • H04L27/3818—Demodulator circuits; Receiver circuits using coherent demodulation, i.e. using one or more nominally phase synchronous carriers

Abstract

PURPOSE:To ensuer an assured lead-in of the regenerated carrier wave to the prescribed phase by controlling the control voltage of the voltage control oscillator which has the phase synchronization with the input signal of the orthogonal partial response modulated wave via the switch which selects phase detection output. CONSTITUTION:The orthogonal partial response modulated wave sent from input terminal IN is applied to phase detector PD1 and PD2, and the phase detection is given by the output carrier wave of voltage control oscillator VCO. In this case, the carrier waves featuring the 90 deg.-phase difference is applied to PD1 and PD2 through 90 deg.-phase shifter PHS. This output is then applied to logic circuit LG plus delay circuit DL1 and DL2. The output of DL1 is branched off into two: one is sent to adder ADD via inverter INV1 and switch SW1, and the other is sent also to ADD via SW2. In the same way, one of the output of DL2 is applied to ADD via SW3 and the other is applied to ADD via inverter INV2 respectively. The output of ADD is fed back to oscillator VCO via low pass filter LPF.
JP13179277A 1977-11-02 1977-11-02 Carrier wave regenerator circuit Pending JPS5464960A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13179277A JPS5464960A (en) 1977-11-02 1977-11-02 Carrier wave regenerator circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13179277A JPS5464960A (en) 1977-11-02 1977-11-02 Carrier wave regenerator circuit

Publications (1)

Publication Number Publication Date
JPS5464960A true JPS5464960A (en) 1979-05-25

Family

ID=15066231

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13179277A Pending JPS5464960A (en) 1977-11-02 1977-11-02 Carrier wave regenerator circuit

Country Status (1)

Country Link
JP (1) JPS5464960A (en)

Similar Documents

Publication Publication Date Title
JPS5464960A (en) Carrier wave regenerator circuit
JPS55134532A (en) High frequency electromagnetic wave reciever with frequency control circuit
JPS55147892A (en) Color signal processing unit
JPS56154859A (en) Carrier wave regenerating circuit
JPS52114256A (en) Phase synchronization circuit
JPS5669934A (en) Leading-in sweep device of pll circuit
JPS5451363A (en) Regenerative circuit for carrier wave
JPS5381057A (en) Phase control system of synchronous oscillating circuit
JPS55110433A (en) Phase synchronism circuit
JPS5787212A (en) Fm modulator and demodulator
JPS55149539A (en) Pll circuit
JPS5693459A (en) Carrier wave reproducing circuit
JPS57123513A (en) Device for reproducing clock signals from binary signals
GB1536094A (en) Radio receiver/emitter station
JPS5694863A (en) Carrier wave regenerating system
JPS5530273A (en) Pll synthesizer
JPS5588458A (en) Modulation system
FR2336003A1 (en) Phase control loop for oscillator - is used as phase shifter for generation of phase shift between oscillator and other frequency
JPS5366353A (en) Carrier reproducer
KR830003983A (en) Digital fully automatic tuning
JPS5561148A (en) Phase synchronization loop circuit
JPS5367337A (en) Digital phase synchronous circuit
JPS5769594A (en) Holding mode current reducing circuit of semiconductor circuit
JPS5680949A (en) Pseudo-leading-in evading circuit of reference carrier reproducing circuit
JPS57135555A (en) Phase continuous fsk modulating circuit