Patent ID: 7795991
Filing Date: 2010-09-14
Classification: H03H

Abstract:
1. An integrated circuit for a transmitting/receiving device of a data transmission system according to IEEE 802.16, having an oscillator, a quadrature mixer, and a circuit arrangement, connected to the oscillator and the quadrature mixer, comprising: a chain connection of a plurality of basic circuits, wherein each basic circuit has a first transmission line for transmitting the first signal, a second transmission line for transmitting the second signal, and a controllable phase-influencing device connected to the first transmission line for controllably influencing the phase of the first signal; a phase difference detector, which is connected to an output side basic circuit and is formed to detect a current phase difference between the first and second signals; and a control unit, which is connected to the phase difference detector and each controllable phase-influencing device and is formed to generate first digital control voltages, dependent on the current phase difference as control signals for each phase-influencing device, wherein the digital control voltage can assume only two different voltage values, and wherein each controllable phase-influencing device has at least one first tunable capacitive unit, which is connected to the first transmission line and the control unit and is designed to delay the first signal depending on the digital control voltage of the first control signals.