Sirific Wireless Corporation

James Wei

Tajinder Manku

Volodymyr Yavorskyy

A low-phase noise voltage control oscillator (VCO) comprising a voltage source for supplying control voltage to the VCO core; a phase lock loop, having an output connected to an input of the voltage source; a VCO core, including an amplifier circuit with noiseless biasing and a tank circuit with noiseless biasing of the varactors; having an output connected to an input of the phase lock loop; and an attenuator, located between the voltage source and the VCO core, for reducing phase noise from the voltage source to the VCO core.

Method and apparatus for reduced noise band switching circuits

An integrated circuit logic topology or architecture suitable for low voltage differential logic operating at radio frequencies is disclosed. The topology, referred to as enhanced pseudo common mode logic, is similar to and compatible with traditional CML, and provides the additional advantage of eliminating the need for level conversion between consecutive logic gates, thereby increasing the potential maximum operating frequency of subsystems implemented using the invention. The invention retains most of the advantages of traditional CML, and in addition permits the independent selection of output logic high level and output logic low level so that they may be matched with the succeeding circuit input levels.

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Scarborough, Canada

James Wei