Abstract: A receiver has an input stage (LNA) that comprises, in a signal direction from an input (SI) to an output (SO), an input transistor (Q1) and an attenuator (D1, D2, R7-R12, C2-C5). The attenuator provides an attenuation that depends on a control signal (VDC). The input stage comprises a transistor-biasing circuit (R2) that biases the input transistor in dependence on the control signal.

Abstract: A planar antenna device (AD) for a TV receiver (R) comprises i) a loop antenna (LA) comprising first (E1) and second (E2) ends spaced one from the other, ii) a tuning means (TM) connected to the first (E1) and second (E2) ends of the loop antenna (LA) and arranged to control the frequency of the VHF TV signals this loop antenna (LA) is able to receive from command signals, iii) a first ground plane (GP1) cooperating with the loop antenna (LA) in order to act as a UHF monopole in receiving TV signals with UHF frequencies, iv) a first coupling means (CM1) coupled to the loop antenna (LA) at a first chosen location and arranged to deliver the received VHF signals, v) a second coupling means (CM2) coupled to the loop antenna (LA) at a second chosen location and arranged to deliver the received UHF signals, vi) an amplification means (AM) coupled to the first ground plane (GP1) and arranged to amplify TV signals, and vii) a switching means (SM) arranged to couple the amplification means (AM) to the first coupling

Abstract: A receiver has an input stage (LNA) that comprises, in a signal direction from an input (SI) to an output (SO), an input transistor (Q1) and an attenuator (D1, D2, R7-R12, C2-C5). The attenuator provides an attenuation that depends on a control signal (VDC). The input stage comprises a transistor-biasing circuit (R2) that biases the input transistor in dependence on the control signal.

Abstract: A planar antenna device (AD) for a TV receiver (R) comprises i) a loop antenna (LA) comprising first (E1) and second (E2) ends spaced one from the other, ii) a tuning means (TM) connected to the first (E1) and second (E2) ends of the loop antenna (LA) and arranged to control the frequency of the VHF TV signals this loop antenna (LA) is able to receive from command signals, iii) a first ground plane (GP1) cooperating with the loop antenna (LA) in order to act as a UHF monopole in receiving TV signals with UHF frequencies, iv) a first coupling means (CM1) coupled to the loop antenna (LA) at a first chosen location and arranged to deliver the received VHF signals, v) a second coupling means (CM2) coupled to the loop antenna (LA) at a second chosen location and arranged to deliver the received UHF signals, vi) an amplification means (AM) coupled to the first ground plane (GP1) and arranged to amplify TV signals, and vii) a switching means (SM) arranged to couple the amplification means (AM) to the first coupling

Abstract: A description is given of a high frequency filter comprising microstrips. The filter comprises at least two resonators (16, 18) which each have, as frequency-determining elements, a first straight microstrip section (28) and a second straight microstrip section (30), which are parallel next to each other, and also a capacitor assembly (22). In each resonator the capacitor assembly is connected between first ends of the microstrip sections and each resonator is exclusively connected to ground at the second ends of the microstrip sections. In each resonator (16, 18) the sum of the two microstrip sections acts as inductive lement. The resonators (16, 18) therefore act in the same manner as a resonator having a single microstrip, the length of which corresponds essentially to the sum of the lengths of the first microstrip section (28) and the second microstrip section (30). This construction of a filter allows a shorter design compared to conventional filter structures.

Abstract: The transmission system according to the invention comprises a transmitter (10) and a receiver (12). The transmitter (10) can transmit a multicarrier signal (11) to the receiver (12). The receiver (12) comprises an interference absorption circuit (20), which interference absorption circuit (20) comprises interference detection means (26) for detecting interference components, e.g. impulsive noise components, included in the multicarrier signal (11) and interference removal means (28) for substantially removing the interference components from the multicarrier signal (11). The interference detection means (26) are arranged for generating and supplying to the interference removal means (28) an interference presence signal (27) which is indicative of the presence of the interference components in the multicarrier signal (11).

Abstract: The transmission system according to the invention comprises a transmitter (10) and a receiver (12). The transmitter (10) can transmit a multicarrier signal (11) to the receiver (12). The receiver (12) comprises an interference absorption circuit (20), which interference absorption circuit (20) comprises interference detection means (26) for detecting interference components, e.g. impulsive noise components, included in the multicarrier signal (11) and interference removal means (28) for substantially removing the interference components from the multicarrier signal (11). The interference detection means (26) are arranged for generating and supplying to the interference removal means (28) an interference presence signal (27) which is indicative of the presence of the interference components in the multicarrier signal (11).