Telefonaktiebolaget Lm Ericsson (publ)

Nokia Corporation

Optis Circuit Technology, LLC

St-ericsson Sa

Jukka Kohola

Marko Pessa

Mikko Lintonen

Olli Varkki

A temperature sensor includes two branches, each branch having at least a first transistor and a second transistor connected as diodes and cascaded, so that an emitter of the first transistor is connected to a collector of the second transistor of the same branch. The temperature source also includes a current source configured to provide a current to the two branches, and an analog-to-digital convertor. The analog-to-digital convertor is connected to capture a voltage between emitters of the first transistors or of the second transistors, and is configured to convert said voltage to a digital temperature signal.

Temperature sensor with layered architecture

A clock generation circuit is operative to disable and enable a plurality of output clock signals while maintaining predetermined phase relationships between the clock signals. A reference clock signal is divided by a factor of at least two, to generate a master clock signal. A plurality of phase circuits, each independently enabled, generates a plurality of output clock signals by dividing the reference clock signal. The output clock signals have predetermined phase relationships relative to each other. Each phase circuit is enabled synchronously to a synchronization edge of the master clock signal. A synchronization circuit associated with each phase circuit ensures synchronization with the master clock signal by outputting a phase circuit enable signal only upon the conditions of a clock enable signal associated with the output clock being asserted and the receipt of a predetermined number of master clock signal synchronizing edges.

Clock phase alignment

A radio transceiver of a telecommunication system is provided, the radio transceiver including an integrated circuit comprising a phase locked loop, the phase locked loop including a voltage controlled oscillator, a detector unit, and a control unit. The spurious charge accumulated in the charge source in the control unit is conducted to the ground between two successive current pulses generated by the charge source, thus improving the stability and spectral quality of the output signal of the phase locked loop.

Growing community of inventors

Oulu, Finland

Jukka Kohola