Abstract:
A stabilization circuit (100) which comprises: serial stabilization blocks (110,120) connected in series, with respect to a signal to be amplified, with an amplification element; parallel stabilization blocks (130,140) connected in parallel with the amplification element, with respect to a signal to be amplified; and a switch part (150) capable of connecting and disconnecting said parallel stabilization block (140), with respect to a signal to be amplified.
Abstract:
An Extremely High Frequency (EHF) dual-mode PA with a power combiner is designed using 40-nm bulk CMOS technology. One of the unit PAs can be switched off for the low power applications. In the design, circuit level optimization and trade-off are performed to ensure the good performance in both modes. The PA achieves a PSAT of 17.4 dBm with 29.3% PAE in high power mode and a PSAT of 12.6 dBm with 19.6% PAE in low power mode. The reliability measurements are also conducted and a lifetime of 80613 hours is estimated based on a commonly used empirical model. The excellent performance (e.g., highest reported PAE) achieved in this design further confirms the scaling of CMOS technology will continue to benefit the mm-wave transceiver design.
Abstract:
The present invention relates to a power amplifier unit (30, 40, 50, 60a-60d, 70) comprising a power amplifier element (31, 41, 51, 71) and a matching unit (32, 42, 52, 72). The unit comprises an impedance matched MicroElectroMechanicalSystem (MEMS) switch element (33, 43, 53, 73) between said power amplifier element (31, 41, 51, 71) and said matching unit (32, 42, 52, 72).
Abstract:
A power amplification circuit (10) includes a scalable power amplifier (20) to produce an RF output signal (50) at an output of the power amplification circuit (10), and a variable impedance circuit (30) coupled to the output of the power amplification circuit (10). The scalable power amplifier (20) includes a plurality of selectively activated amplifier elements (22), (24), (26) to produce the RF output signal (50) in accordance with a desired RF output signal power level. The power amplification circuit (10) selectively activates individual amplifier elements by, for example reducing power or increasing power to at least one amplifier element. The variable impedance circuit (30) varies an impedance of the variable impedance circuit (30) to dynamically load the output of the scalable power amplifier(20).
Abstract:
The high frequency tuning amplifier (3) for buffer has a tuning circuit (8) consisting of a serial circuit of the first (20) and second (21) inductors connected between the output of transistor amplifying stage and the power source, a first capacitor (22) connected in parallel to the serial circuit of first and second inductors, a serial circuit of the second (23) and third (24) capacitors connected in parallel to the second inductor and a switching element (26) to which a band switch voltage is supplied, connected between the connecting point of the second and third capacitors and the reference voltage point. The turning circuit is turned to the high band frequency when the switching element is turned ON and to the low band frequency when the switching element is turned OFF.
Abstract:
Die Erfindung betrifft eine Signalkopplungsvorrichtung zur Übertragung von Sendesignalen zwischen einem Endgerät (2) und einer Antenne (11), wobei die Signalkopplungsvorrichtung (1) eine endgeräteseitige Schnittstelle (4), mindestens eine Dämpfungseinrichtung (5) und mindestens einen Verbindungssignalzweig (6) zur Verbindung der endgeräteseitigen Schnittstelle (4) mit der Dämpfungseinrichtung (5) umfasst, wobei die Signalkopplungsvorrichtung (1) mindestens eine erste Einrichtung (7) zur Sendeaktivitätsdetektion umfasst, wobei die erste Einrichtung (7) zur Sendeaktivitätsdetektion signaltechnisch mit dem Verbindungssignalzweig (6) gekoppelt ist, wobei mittels der ersten Einrichtung (7) zur Sendeaktivitätsdetektion ein Schutzsignal (SS) zur Steuerung der Dämpfungseinrichtung erzeugbar ist, wenn eine Sendeleistung eines Sendesignals höher als eine vorbestimmte Leistung ist, sowie ein Verfahren zum Betrieb einer Signalkopplungsvorrichtung.
Abstract:
A tunable loadline is disclosed. In an exemplary embodiment, an apparatus includes an amplifier configured to output an amplified signal having a selected power level and a first impedance network coupled to receive the amplified signal at an input terminal and generate a first output signal having a first power level at a first output terminal. The first impedance network being configured to load the amplified signal to convert the selected power level to the first power level. The apparatus also includes a second impedance network configured to selectively receive the first output signal and generate a second output signal having a second power level at a second output terminal. The second impedance network being configured to combine with the first impedance network to load the amplified signal to convert the selected power level to the second power level.