Nokia Corporation

Nokia Solutions and Networks Oy

Jussi Ryynänen

Jarkko Jussila

Jouni Kaukovuori

Marko Kosunen

Jerry Lemberg

Enrico Roverato

Mikko Martelius

Kari Stadius

According to an aspect, there is provided a method for power-amplification of a transmission signal, comprising: obtaining the transmission signal with phase and amplitude modulation; generating a power-amplified polar signal for approximating a power-amplified transmission signal by power-amplifying a first constant-envelope signal with one of two or more first amplification factors based on the transmission signal; generating an outphasing pair of a first power-amplified outphasing signal and a second power-amplified outphasing signal based on the transmission signal; and combining the power-amplified polar signal, the first power-amplified outphasing signal and the second power-amplified outphasing signal to provide the power-amplified transmission signal.

Tri-phasing modulation for efficient and wideband radio transmitter

Disclosed is a multi-mode radio frequency amplifier. The amplifier includes a plurality of input transistors, a plurality of output branches, and a switching stage interposed between the plurality of input transistors and the plurality of output branches for selectively connecting the plurality of input transistors to the plurality of output branches. Individual ones of operational modes of the multi-mode amplifier correspond to an individual one of the plurality of frequency selective loads. A particular one of the plurality of frequency selective loads is one of operating or non-operating during operation of the multi-mode amplifier. A gain of the multi-mode amplifier is reduced by controlling the plurality of elements to steer a predetermined portion of a total signal current that is output from one of the input transistors, from an associated operating frequency selective load to a non-operating frequency selective load.

Amplifier and amplifier gain adjustment circuitry using current steering, and multimode communication device containing same

An inductively degenerated low noise amplifier arrangement is shown having a transistor and a bonding pad connected to the input terminal of the transistor, wherein the bonding pad has parasitic capacitance, and wherein the bonding pad includes a metal layer connected to a second terminal of the transistor. In case of a field-effect transistor the second terminal may be the source and in case of a bipolar transistor the second terminal may be the emitter. The metal layer may be the ground plane of the bonding pad or an additional, intermediate layer.

Semiconductor device

The present invention relates to a method and circuit arrangement for adjusting a gain, wherein said circuit arrangement comprises at least a first output branch connected to a first load and a second output branch connected to a second load. The gain control function is realized based on a current splitting, wherein a non-operated output branch is used as a kind of dummy branch for receiving a part of the output current. Thus, only as many output branches as there are outputs are required to implement a gain control based on splitting. Thereby, a complexity of the layout design is reduced and control and biasing of dummy branches is not required.

Growing community of inventors

Helsinki, Finland

Jussi Ryynänen