Abstract: A RF switching arrangement (400) is described including a bias swap circuit (30). The bias swap circuit switches the bias voltage dependent on the state of the RF switch. This improves the performance of the RF switch without requiring charge pump circuitry.

Abstract: A RF switching arrangement (400) is described including a bias swap circuit (30). The bias swap circuit switches the bias voltage dependent on the state of the RF switch. This improves the performance of the RF switch without requiring charge pump circuitry.

Abstract: Devices (1) for exchanging ultra wide band signals comprise frequency translating stages (20,30) for frequency translating signals and oscillating stages (40) for supplying main inphase/quadrature oscillation signals to the frequency translating stages (20,30). By providing the oscillating stages (40) with polyphase filters (43,44) for reducing harmonics in oscillation signals, the main oscillation signals will be sufficiently clean. The oscillating stages (40) comprise mixers (46) for converting first inphase/quadrature oscillation signals and second inphase/quadrature oscillation signals into the main oscillation signals. The polyphase filters (43,44) may be located before and after the mixers (46). Frequency selectors (45) replace prior art multiplexers located after the mixers (46).

Abstract: A switched-mode control circuit (1) for a switched-mode power supply or an audio amplifier. It comprises a monitoring loop (3) for the output signal of the switched-mode circuit (2). A tuner (7) supplies the reference signal, which is related to the protected frequency or frequency band. The monitoring loop (3) comprises two quadrature mixers (4, 5) with a filter (6) in between and generates a correction signal which leads back to the switched-mode circuit (2). The corrective changes performed by the monitoring loop (3) are synchronization pulses that are added to the reference signal. This results in a shifting in time of each switching position of the switched-mode circuit (2).

Abstract: Mixer-systems for up/down-converting frequencies comprise many components: in case of balanced quadrature conversion, some parts will show a fourfold repetition (insight). By creating a three-phase mixer-system (10,40), less components will be necessary (basic idea). The sub-signals in the group of sub-signals at the sub-outputs have phase differences being present between two subsequent sub-signals within an interval of 100-140 degrees, which makes these sub-signals already (substantially) balanced. In case of said phase differences being each within an interval of 118-122 degrees, the sub-signals are even better balanced, and when being 120 degrees, the sub-signals are perfectly balanced. A group of transistors (11-13,14-16,17-19,41-43,44-46,47-49) per sub-input (1,2,3) switches and/or amplifies the sub-signals at the sub-inputs. In an active mixer-system (10), said groups of transistors (11-13,14-16,17-19) are switched by further transistors (20-22).

Abstract: The invention relates to a travelling-wave amplifier comprising amplifiers and transmission lines. The travelling-wave amplifier provides compensation for the losses of the transmission lines, amplification of the signals and isolation between input and output by coupling the amplifiers to the transmission lines anti-parallel.

Abstract: An electronic circuit is provided which can autonomously handle an input current (Ii) having a relatively wide dynamic range without being overdriven. The electronic circuit comprises an amplifier stage (AMPST) having an input (IP) for receiving the input current (Ii) and an output (OP) for supplying an output current (Io), such that, during operation, the strength of the output current (Io) increases in response to an increasing strength of the input current (Ii) as long as the strength of the input current (Ii) has not exceeded an input reference level. The strength of the output current (Io) is kept approximately constant when the strength of the input current (Ii) has exceeded the input reference level but has not exceeded a further input reference level. The strength of the output current (Io) decreases in response to an increasing strength of the input current (Ii) when the strength of the input current (Ii) has exceeded the further input reference level.