Showing papers on "Master clock published in 1970"

Automatic clock frequency-switching system

Abstract: An automatic clock frequency-switching system for electric systems such as electronic computer systems comprising a clock source including a plurality of oscillators generating frequencies different from one another, and a clock frequency control capable of performing a stable operation even during the period when clock is interrupted. While the clock frequency is being switched, the supply of clock to a mechanism which is operative in response to clock pulses is stopped. After the clock frequency has been switched clock is supplied to the mechanism to resume the operation thereof.

Digital master clock

Abstract: A master clock source develops clock signals for transmission to a plurality of receiving or ''''slave'''' terminals. The clock signals are periodically scanned and transferred to the slave terminals once each second, thereby to continuously up-date the clock indication at the receiving terminals.

Binary data transmission system and clocking means therefor

Abstract: A serial binary data transmission system which is self-clocking and recovers clock signals by rectification of a transmitted bipolar signal. By use of the present system, a plurality of stations may be served by a single master clock. Being base band, there are no tuned circuits in the present system nor is there a need for individual clocks at remote terminals of stations.

Synchronization method and apparatus for disc recorders

Abstract: A method and apparatus for synchronizing a video source, such as a television camera, with a recording disc wherein prerecorded clock signals are provided on the disc on a first track and master clock signals are recorded on a second track with the recorded master clock signals being utilized in the generation of drive and synchronizing signals for the video source so that the video source and the disc are directly synchronized and the prerecorded clock signals are compared with an external source of clock signals for controlling the speed of the disc.

Traffic concentrator for telecommunication system with tree structure

Abstract: A telephone system with a plurality of subscriber lines branched off a common trunk line with a number of parallel channels less than the number of subscriber lines includes a single service line extending from a terminal station to all the subscriber stations for the exchange of call, switching and disconnect signals. Each subscriber station is allotted a time slot in a scanning cycle established at the central office by a master clock and characterized by a relatively wide starting pulse followed by a series of relatively narrow address pulses each initiating a signaling interval assigned to a respective subscriber. A timer at a subscriber station, responding to the starting pulse, measures a delay period individual to that station at the end of which the assigned address pulse starts a slave clock conditioning the subscriber station for the transmission and reception of signals during specific phases of its time slot and for the seizure or release of a channel of the trunk line in response thereto.

Synchronization of static inverters

Abstract: A system for synchronizing the static inverter enables the phasing of the output from a static inverter in correspondence to an alternate power supply. The synchronized system compares the static inverter output with the alternate power source in a phase detector which outputs an error correcting signal which is used to adjust the static inverter master clock.