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| Number | Title | Issue Date |
| 7983276 | Timing source A timing source is provided for sending timing information via a packet network. The source comprises a clock for generating the timing information and a packet-forming section for forming a sequence of packets for transporting the timing information to a destinatio... | 07/19/2011 |
| 7508843 | Method and apparatus for distributing timing data across a packet network A method for distributing timing information across a packet network includes generating timing signals at a master clock at predictable intervals using a clock reference of a given frequency. The timing signals are broadcast or multicast to a plurality of slave clo... | 03/24/2009 |
| 7428308 | Transmitting and reproducing stereophonic audio signals Apparatus and method for transmitting and reproducing stereophonic audio signals are disclosed. The method comprises splitting first and second channels into two frequency bands, combining the lower frequency band signals of the two channels, and transmitting the co... | 09/23/2008 |
| 7411970 | Adaptive clock recovery A method of recovering a clock signal for a TDM output from packets of TDM data which have been transmitted over a packet network, from a source having a source TDM clock to a destination having a destination TDM clock. The method includes providing at least some pa... | 08/12/2008 |
| 7102437 | Integrated circuit device An integrated circuit device includes an amplifier stage comprising a pair of transistors (134A, 134B), the respective bases or gates of which are connected together, as well as the respective emitters or sources. The respective drains or collectors of... | 09/05/2006 |
| 7065337 | Tuner for digital terrestrial broadcast signals A single conversion tuner is provided for receiving digital terrestrial broadcast signals. The tuner comprises a single frequency changer comprising a mixer and local oscillator controlled by a PLL synthesiser. A non-alignable variable low pass filter is provided be... | 06/20/2006 |
| 7012457 | Mixer circuit offset compensation A mixer circuit arrangement for frequency-translating a voltage input signal by an amount dependent on the frequency of a local oscillator signal to provide an output signal. The arrangement comprises an input stage 33 and a mixer stage 32, the input s... | 03/14/2006 |
| 6995610 | Amplifier and radio frequency tuner An LNA for use as an input stage of a radio frequency tuner comprises an inverting amplifier stage and a transconductance stage. The amplifier stage has an input connected via an input resistance to an input of the amplifier and via a feedback resistance to an outpu... | 02/07/2006 |
| 6990615 | Data processing device A data and clock recovery circuit is provided for generating a recovered version of a transmitted data stream. The data and clock recovery circuit comprises three main circuit modules, namely a data recovery circuit, a clock recovery circuit, and a detector circuit.... | 01/24/2006 |
| 6901248 | Frequency converter and radio frequency tuner A single conversion frequency converter comprises an image reject mixer and a local oscillator. The local oscillator comprises a variable frequency oscillator and a variable divider. The variable divider supplies to the mixer a local oscillator signal whose frequenc... | 05/31/2005 |
| 6898649 | Arbiter for queue management system for allocating bus mastership as a percentage of total bus time An arbiter (7) is provided for a QMS having multiple queue users (5A to 5D), each having real time requirements for mastership of a bus (31). The arbiter (7) is arranged so that the amount of time that each queue user (5A to... | 05/24/2005 |
| 6895063 | Frequency changer and digital tuner A zero or near zero IF frequency changer for use in a digital tuner comprises multipliers which receive the RF input signal from an input. The multipliers receive quadrature local oscillator signals from a first oscillator of an arrangement which comprises first and... | 05/17/2005 |
| 6881655 | Contact resistances in integrated circuits A method is provided of forming a low resistance contact between a poly-silicon resistor of an integrated circuit and a conducting material, the method comprising the steps of: a) covering the resistor with an insulating layer; | 04/19/2005 |
| 6809585 | Frequency modulation system and method A frequency modulation system is disclosed which includes a voltage-controlled oscillator (VCO) 43 and a phase detector 47 configured to receive an output signal from the VCO. The phase detector is arranged to output an error signal representing the ph... | 10/26/2004 |
| 6791414 | Signal processing stage and radio frequency tuner A signal handling stage provides variable gain, for example for automatic gain control functions, in a radio frequency tuner. The stage comprises a transconductance stage having negative feedback via further transconductance stage. The output current of the transcon... | 09/14/2004 |
| 6787876 | Semiconductor device A semiconductor device comprises a substrate (11) having an insulating layer (12) formed on a surface thereof, and a silicon layer (13) located on a surface of the insulating layer. A trench (14) extends from a surface of the silicon laye... | 09/07/2004 |
| 6747512 | Amplifier and tuner An amplifier which is suitable for use as a radio frequency low noise amplifier comprises first, second and third transconductance stages. The amplifier input is connected to the inputs of the first and third stages, whose outputs are connected together in anti-phas... | 06/08/2004 |
| 6664824 | Frequency doubler circuit arrangement A frequency doubler circuit arrangement comprises a full wave rectifier circuit having an input and a first terminal, the first terminal being connected to a first supply terminal via a first current source, and the input forming an input of the frequency... | 12/16/2003 |
