Jarmo Heinonen

Transmitter/receiver for transmitting and receiving of an RF signal in two frequency bands

Dual mode transmission system with switched linear amplifier

Spread spectrum radiotelephone having adaptive transmitter gain control

Direct digital synthesizer for producing a modulated intermediate frequency in a radio apparatus

Detection of lightning

Circuit arrangement for automatic frequency control in a radio telephone

Mobile phone with vibrating alarm

Dual mode voltage controlled oscillator having controllable bias modes and power consumption

Dual mode transmission system

Direct conversion receiver architecture