In an integrated circuit receiving multiple serial data streams in parallel, a local clock is generated from each data stream and is synchronized with the data stream. Sometimes a data stream may have no transitions making it difficult to keep the clock synchronized with its data. A clock channel is provided, which always has edges. A circuit is provided for each data stream which measures the time elapsed since the data stream had an edge. After a certain period, the phase of the local clock is...

A system for synchronising a rotary member with a series of synchronising pulses, suitable for use in synchronising a film projector with a television scanning raster comprises a rotary member; a divider for obtaining two repetitive signals whose frequency is relatively small from a series of synchronising pulses fed to the said divider; a generator for providing in response to a first of the repetitive signals a repetitive sawtooth wave form of the same fundamental frequency as the first repeti...

A line synchronising circuit in a picture display device comprises a phase discriminator, a loop filter and a line oscillator constituting a control loop for controlling the frequency and/or the phase of the oscillator signal. To reduce the phase error, which occurs after a phase jump in the incoming signal, and to reduce the time in which the error is visible, the loop filter has a first part for supplying a first control signal having a first response time and a second part for supplying a sec...

A synchronizing signal separator receives synchronizing signals from a remote source. A window generator opens a window for a period and a counter regenerates synchronizing signals detected when the window is open. Detection of an incoming synchronizing signal when the window is open causes a window counter to be stopped to reduce the window duration to approach a set minimum width. The window generator and the counter are controlled by a voltage controlled oscillator whose oscillation frequency...

Pulse signals from a radio receiver are applied to a synchronizing winding to synchronize the pendulum, balance wheel or other mechanical oscillator of a timing device, and a transistor-switching device controlled by a pickup operated by the said mechanical oscillator is electrically connected to prevent the energization of the synchronizing winding except when the mechanical oscillator is within a predetermined limited range of positions, so as to eliminate parasitic noise signals received duri...

A method of synchronizing data in a communications system includes generating a composite signal comprising a serial stream of data partitioned in one or more frames, and transmitting the composite signal to a receiver. Multiphase clock signals are generated. The composite signal received at the receiver is compared with each of the multiphase clock signals until either sustained coincidence therebetween is achieved or sustained non-coincidence is achieved, thereby synchronizing the receiver to ...

A receiver produces complex data samples from a demodulated received signal. The data samples, which may form a preamble identifying a wireless LAN data burst, are arranged in a sequence comprising sub-sequences having a predetermined relationship with each other. A tuning frequency offset is determined by delaying the complex data samples by a plurality of different delay periods, auto-correlating the complex data samples using said different delay periods in order to produce respective auto-co...

The present invention provides an apparatus and method for synchronizing a first pipeline and a second pipeline of a processor arranged to execute a sequence of instructions. The processor is arranged to route an instruction in the sequence through either the first or the second pipeline dependent on predetermined criteria, each pipeline having a plurality of pipeline stages including a retirement stage. Counter logic is provided for maintaining a first counter relating to the first pipeline and...

The invention relates to a mobile communications device comprising a housing, a transceiver in the housing, a keypad connected to the housing, and a display connected to the housing, wherein the housing comprises a first section movably connected to a second section of the housing by a multi-axis hinge, wherein a first axis of rotation of the hinge is provided at the first section of the housing and a second offset axis of rotation of the hinge is provided at the second section of the housing, a...

The invention relates to a mobile communications device comprising a housing, a transceiver in the housing, a keypad connected to the housing, and a display connected to the housing, wherein the housing comprises a first section movably connected to a second section of the housing by a multi-axis hinge, wherein a first axis of rotation of the hinge is provided at the first section of the housing and a second offset axis of rotation of the hinge is provided at the second section of the housing, a...