1
Michihiro Izumi, Kazunari Watanabe: Spread spectrum communication apparatus and telephone exchange system. Canon Kabushiki Kaisha, Fitzpatrick Cella Harper & Scinto, November 14, 1995: US05467367 (98 worldwide citation)

A telephone exchange system of this invention has a terminal connected to an extension by radio. As a radio communication modulation method, a spread spectrum method is used. A speech signal received from a line by the telephone exchange system is exchanged by an exchange switch, and is supplied to ...


2
Haruhiko Nakamura, Junya Tempaku: Phase synchronization circuit. Fujitsu, Armstrong Nikaido Marmelstein & Kubovcik, December 15, 1987: US04713621 (63 worldwide citation)

A phase synchronization circuit for controlling a graphic display device in a teletext receiving system. The phase synchronization circuit includes a delay circuit, adapted to delay in sequence clock signals which are to be phase-synchronized with a reference signal and to produce in sequence delaye ...


3
Takuro Muratani, Hideo Kobayashi, Toshinari Kimura: Phase synchronization system. Kokusai Denshin Denwa Kabushiki Kaisha, Emmanuel J Lobato, Robert E Burns, August 29, 1989: US04862104 (43 worldwide citation)

A phase synchronization circuit for processing a received signal, the phase of which is detected by a first reference carrier from a fixed oscillator and a second reference carrier orthogonal to the first reference carrier. Two baseband signals are thus obtained and sampled with a certain period. Co ...


4
Takao Ogawa, Takeshi Kawasaki: Phase synchronization circuit. Seiko Epson Corporation, Raymond J Werner, February 8, 1994: US05285483 (27 worldwide citation)

Voltage controlled oscillator 40 has an oscillation stoppage cancelling circuit 46 and a current/frequency converter circuit 44 which is a ring oscillator made by connecting inverters forming 3 stages like a ring. Oscillation stoppage canceling circuit 46 stops and releases oscillation of the ring o ...


5
Jeannie H Kosiec, Steven F Gillig: Phase synchronization circuit and method therefor for a phase locked loop. Motorola, Kevin D Kaschke, March 5, 1996: US05497126 (26 worldwide citation)

An improved phase synchronization circuit (301) and method therefor for a phase locked loop (300). Each of a divided reference frequency signal (206) and a feedback signal (209) is held in a predetermined state. The divided reference frequency signal (206) is enabled responsive to the phase of a ref ...


6
Kalman Szechenyi: Circuit arrangement for frame and phase synchronization of a local sampling clock. International Standard Electric Corporation, John T O Halloran, Robert P Seitter, July 1, 1986: US04598413 (24 worldwide citation)

With such a circuit arrangement, the sampling clock is synchronized to the frame position and the phase of the characters of a received character stream containing a "unique word" at regular intervals. In a digital correlator (1), a crosscorrelation function is generated from a unique word stored th ...


7
Kazuaki Masuda: Phase synchronization circuit having a short pull-in time and a low jitter. NEC Corporation, Foley & Lardner, December 12, 1995: US05475326 (23 worldwide citation)

In a phase synchronization circuit including a digital phase comparator, a synchronism discrimination circuit, a charge pump circuit, a loop filter, a voltage controlled oscillator, and a frequency-division circuit, the charge pump circuit comprises a level comparator comparing the output voltage of ...


8
Satoru Sonobe: Variable clock dividing circuit. NEC Corporation, Sughrue Mion Zinn Macpeak & Seas, February 14, 1995: US05389826 (21 worldwide citation)

This variable clock dividing circuit is provided with a plurality of dividers coupled in succession. A first of the dividers divides the basic clock by a predetermined dividing ratio and provides an output clock signal to the next divider in succession, while the last divider receives an output cloc ...


9
Amir Bar Niv: Method and apparatus for synchronizing timing signals of two integrated circuit chips. National Semiconductor Corporation, Skjerven Morrill MacPherson Franklin & Friel, May 20, 1997: US05631591 (20 worldwide citation)

A phase synchronization circuit uses a phase comparator and adjustable delay lines that selectively delay a system clock timing signal applied to two integrated circuit chips. The phase comparator and delay lines compensate for propagation delays in each of the integrated circuit chip. The phase com ...


10
Kazuyoshi Horiike, Makoto Hagai: Method and apparatus for telecine image conversion. Matsushita Electric Industrial, Panitch Schwarze Jacobs & Nadel P C, December 1, 1998: US05844618 (19 worldwide citation)

An input telecine image is held by a field memory, and correlation values of respective images in a first field and a second field are calculated by correlation value calculation circuits. The correlation values are compared with a predetermined threshold value, and when the correlation value is sma ...