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1. 发明专利

JPS604322A DIGITAL AGC CIRCUIT 失效
公开(公告)号：JPS604322A
公开(公告)日：1985-01-10
申请号：JP11332883
申请日：1983-06-23
申请人： FUJITSU LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： UMIGAMI SHIGEYUKI , IHIRA KUNINOSUKE , AONO MASA , KAKO TAKASHI , JINBO YOSHIHIRO , KIMURA TADAKATSU
IPC分类号： H03M7/00 , H03G3/20
摘要： PURPOSE:To improve the operation precision of AGC by setting automatically an operation region of digital AGC in accordance with a peak factor. CONSTITUTION:An input digital signal (x) is supplied to a peak detecting circuit 11, an average power operating circuit 12, and a multiplier 15, and a peak value Pk and an average power PW are applied to an adder 13, and a difference signal AP=Pk-PW is outputted and is applied to a reciprocal generating circuit 14, and a coefficient 1/AP=Ax is outputted and is applied to the multiplier 15. When the peak value Pk is large, the coefficient Ax is small, and therefore, the average power of the input signal (x) to AGC loops 1 and 10 is small, and saturation of the peak value of an output digital signal (y) is avoided. When the peak value Pk is small, the coefficient Ax is large, and the average power of the input signal (x) to AGC loops 1 and 10 is large, and the operation precision of AGC loops 1 and 10 is improved.

2. 发明专利

JPS59223009A DIGITAL PROCESSING TYPE AUTOMATIC GAIN CONTROLLING CIRCUIT 失效
公开(公告)号：JPS59223009A
公开(公告)日：1984-12-14
申请号：JP9581183
申请日：1983-06-01
申请人： FUJITSU LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： UMIGAMI SHIGEYUKI , IHIRA KUNINOSUKE , KAKO TAKASHI , MURATA HIROYASU , JINBO YOSHIHIRO , KIMURA TADAKATSU
IPC分类号： H03G3/20 , H03G3/30
摘要： PURPOSE:To set a correct signal level and to always stabilize an output signal by providing a feedback circuit consisting of an automatic gain control coefficient generating circuit and a signal level setting circuit, and a DC offset compensating circuit, and eliminating a DC offset mixed in a digital signal. CONSTITUTION:When a correct digital signal D is supplied to a signal level setting circuit 22, the signal D is turned back with regard to a contact potential O, its absolute value is taken, and its signal level Vp is outputted. This signal level Vp is supplied to the third adder 215, a difference Vth-Vp to a reference value Vth from its input terminal is outputted, also a constant (k) from its input terminal is multiplied by the first multiplier 214, k(Vth-Vp) is supplied to the second adder 213, and a cumulative value of (Vth-Vp) before the previous time accumulated in the first integrator 212 is added. Accordingly, in the first adder 211, an initial value 1.0 from its input terminal is further added, a prescribed automatic gain coefficient is generated, ant it is multiplied to the input signal D which has eliminated a DC offset of the next time, by a multiplier 1.

3. 发明专利

JPS5877370A FACSIMILE TRANSMISSION CONTROL SYSTEM 失效
公开(公告)号：JPS5877370A
公开(公告)日：1983-05-10
申请号：JP17561781
申请日：1981-11-04
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： SONEHARA NOBORU , TOKIKUNI KENTAROU , JINBO YOSHIHIRO
IPC分类号： H04N1/32
摘要： PURPOSE:To evade the collision of incoming with outgoing control signals and to receive a retransmission control signal simply and normally, by providing a circuit detecting the level of a reception signal, and a timer circuit. CONSTITUTION:A reception signal from an input terminal 10 is inputted to a level detection circuit 20. The output of the circuit 20 starts a reception sequencer 21 and the procedure enters the reception sequence. Further, the output of the circuit 20 is inputted also to a control circuit 25. A data speed selection signal is inputted to the circuit 21 and a transmission sequencer 24 from the circuit 25 to change over the data speed. A demodulation circuit 22 or a modulation circuit 23 is controlled with the instructed data speed. The transmission data are modulated at the circuit 23 and transmitted to an output terminal 11.

4. 发明专利

JPS5871746A SQUELCH CIRCUIT OF SYNCHRONIZING TRANSMITTER AND RECEIVER 失效
公开(公告)号：JPS5871746A
公开(公告)日：1983-04-28
申请号：JP17032181
申请日：1981-10-23
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： JINBO YOSHIHIRO , NAKAMURA OSAMU , SONEHARA NOBORU
IPC分类号： H04B1/10 , H04L5/16
摘要： PURPOSE:To keep the input side level less than the normal level for a receiver under transmission and during squelch time, by putting a level controller into the input terminal of the receiver and controlling the level controller with a squelch controlling circuit. CONSTITUTION:A level controller 16 is controlled by a squelch operation controlling signal 14 and through a squelch controlling circuit 13 even while the transmission request signal RS of a terminal is turned on. Thus the signal level is lowered less than the working level of demodulation for the input of a demodulator 7. Therefore the receiving carrier detecting output CD of a terminal 11 is turned off, and the received data RD of a terminal 10 is clamped by a clamping circuit 9. When the signal RS is turned off, the circuit 13 performs a squelch operation. The suppression of the input signal to the demodulator 7 and the control of the controller 16 are eliminated after the squelch time. Thus the circuit 9 is set free. As a result, the CD of the terminal 11 is not turned on, and undesired data is not tramsitted to a device connected to the terminal 10.

5. 发明专利

JPH03195239A NOTICE SYSTEM FOR RESULT OF TRANSMITTAL OF COMMUNICATION SYSTEM 失效
公开(公告)号：JPH03195239A
公开(公告)日：1991-08-26
申请号：JP33592689
申请日：1989-12-25
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： KINOHARA SEIJI , JINBO YOSHIHIRO
IPC分类号： H04N1/32 , H04L29/08
摘要： PURPOSE:To prevent non-transmission of transmittal result notice by editing plural transmittal notices at a location where the transmittal result notice is selected by the user and receiving them by a designated medium. CONSTITUTION:A caller applies connection processing to a communication processing unit 1 via a communication line 6 by using a series of inquiry procedure from a retrieval terminal equipment 4, the communication processing unit 1 uses a line control section 24 to receive the said inquiry while applying the line control procedure processing and transfers an access password designated by the caller and inquiry information of a relevant medium or the like of the retrieval terminal equipment 4 to a transmittal result notice inquiry reception section 20 and inquires about a relevant password to a transmittal result notice store and management section 17. When the relevant password exists, the transmittal result notice store and management section 17 transfers the said management information and the inquiry information to a transmittal result notice generating section 21 to request the generation of the transmittal result notice message according to the designated information medium type.

6. 发明专利

JPS6051293B2 失效
公开(公告)号：JPS6051293B2
公开(公告)日：1985-11-13
申请号：JP13825080
申请日：1980-10-04
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： SONEHARA NOBORU , JINBO YOSHIHIRO
IPC分类号： H04L1/24 , H04L5/16 , H04L25/02 , H04L29/14

7. 发明专利

JPS5856298B2 JPS5856298B2 - 失效
公开(公告)号：JPS5856298B2
公开(公告)日：1983-12-14
申请号：JP10262379
申请日：1979-08-10
申请人： Nippon Telegraph & Telephone
发明人： SUZUKI YUTAKA , JINBO YOSHIHIRO , YOSHINO SHUJI
IPC分类号： H03L7/06 , H04L27/06 , H04L27/227 , H04N1/40
CPC分类号： H04L27/066

8. 发明专利

JPS5929011B2 JPS5929011B2 - 失效
公开(公告)号：JPS5929011B2
公开(公告)日：1984-07-17
申请号：JP15297780
申请日：1980-11-01
申请人： Nippon Telegraph & Telephone
发明人： SONEHARA NOBORU , JINBO YOSHIHIRO
IPC分类号： H03H21/00 , H04B3/06 , H04L25/03
CPC分类号： H04L25/03038

9. 发明专利

JPS6338914B2 失效
公开(公告)号：JPS6338914B2
公开(公告)日：1988-08-02
申请号：JP8357579
申请日：1979-06-29
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： NAKAMURA OSAMU , YAMAMOTO TETSUJI , JINBO YOSHIHIRO , KOBAYASHI KAZUO
IPC分类号： H04N1/48 , H04N1/46 , H04N1/64

10. 发明专利

JPS5837731B2 失效
公开(公告)号：JPS5837731B2
公开(公告)日：1983-08-18
申请号：JP16326080
申请日：1980-11-21
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： SONEHARA NOBORU , JINBO YOSHIHIRO
IPC分类号： H04B3/06 , H04L27/22 , H04L27/227

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