Abstract:
A dynamic current source (200) has positive side (205, 217) and negative side (208, 218) differential input transconductance devices arranged as a long-tailed pair to accept a differential input signal (140, 142). A positive side phase-dependent current source (200) communicatively coupled to an output (263) of the positive side differential input transconductance device (205) to provide current for positive side output signal recovery during a phase period when the differential input signal no longer activates the positive side of the dynamic current source. A negative side phase-dependent current source (200) communicatively coupled to an output (272) of the negative side differential input transconductance device (208) to provide current for negative side output signal recovery during a phase period when the differential input signal no longer activates the negative side of the dynamic current source.
Abstract:
A differential cross-coupled common-source or common-emitter low-noise amplifier having capacitive degeneration is disclosed. Further, a radio receiver comprising such a low-noise amplifier is disclosed. Further, a method of controlling switched capacitive networks of an amplifier is disclosed. The method comprises controlling capacitances of the switched degeneration capacitor networks and/or the switched cross-coupling capacitor networks. Further, a computer program for implementing the method is disclosed.
Abstract:
An apparatus including cascaded amplification stages adapted to be biased by a common DC current to generate an amplified output signal from an input signal. A first amplification stage includes a routing network to substantially double an input voltage signal, and a first transconductance gain stage to generate a first current signal from the input voltage signal. A second amplification stage includes a resonator to convert the first current signal into a second voltage signal, and a second transconductance gain stage to generate a second current signal from the first current signal. A third amplification stage includes a current gain stage to generate a third current signal from the second current signal, and a load through which the third current signal flows to generate the output signal.
Abstract:
Systems and method for improving operation of a radio frequency system are provided. One embodiment describes a radio frequency system, which includes a first switching power amplifier that outputs an amplified analog electrical signal based on a first input analog electrical signal and voltage of an envelope voltage supply rail. The first switching power amplifier includes a first transistor with a gate that receives the first input analog electrical signal, a source that is electrically coupled to the envelope voltage supply rail, and a drain that is electrically coupled to an output of the first switching power amplifier; a second transistor with a gate that receives the first input analog electrical signal, a source electrically coupled to ground, and a drain electrically coupled to the output of the first switching power amplifier; and a third transistor with a gate that receives the first input analog electrical signal, a drain electrically coupled to the envelope voltage supply rail, and a source electrically coupled to an output of a second switching power amplifier.
Abstract:
Die Erfindung betrifft eine Verstärkeranordnung für hochfrequente Signale. Diese weist einen Signaleingang (IN) zur Entgegennahme zu verstärkender Hochfrequenzsignale (RF in ), eine erste Verstärkereinrichtung (Mn 1 , Mn 2 ), welche die zu verstärkenden Hochfrequenzsignale verstärkt, wobei die erste Verstärkereinrichtung eine Drain-Schaltung oder eine Sourcefolger-Schaltung oder eine vergleichbare Einrichtung ist, eine weitere Verstärkereinrichtung (GB; Mn 3 , Mn 4 , Mn 5 , Mn 6 ), welche zur ersten Verstärkereinrichtung (Mn 1 , Mn 2 ) parallel ist und die zu verstärkenden Hochfrequenzsignale verstärkt, und einen Signalausgang (OUT) zur Abgabe der von der ersten und der weiteren Verstärkereinrichtung (GB; Mn 3 , Mn 4 , Mn 5 , Mn 6 ) verstärkten Hochfrequenzsignale (RF out ) auf.
Abstract:
An apparatus including cascaded amplification stages adapted to be biased by a common DC current to generate an amplified output signal from an input signal. A first amplification stage includes a routing network to substantially double an input voltage signal, and a first transconductance gain stage to generate a first current signal from the input voltage signal. A second amplification stage includes a resonator to convert the first current signal into a second voltage signal, and a second transconductance gain stage to generate a second current signal from the first current signal. A third amplification stage includes a current gain stage to generate a third current signal from the second current signal, and a load through which the third current signal flows to generate the output signal.
Abstract:
An apparatus includes a first capacitor, an inductor coupled to the first capacitor, and a second capacitor coupled to the inductor. The second capacitor is coupled to a first output of a differential amplifier.
Abstract:
A power amplifier includes a first transistor and a first inductor disposed between the first transistor and a voltage source. A first node between the first transistor and the first inductor is an output node. The power amplifier further includes a second inductor disposed between the first transistor and ground. The power amplifier further includes a third inductor coupled to a gate of the first transistor and configured as a first AC input. The power amplifier further includes a first phase conditioner inductively coupled to the second inductor and the third inductor and configured to set phases of AC signals across the first inductor and the second inductor in phase. The second inductor is configured to release energy into the first inductor to raise a voltage of the AC signal and raise a power output at the output node.
Abstract:
An electronic circuit comprises coupled transconductors. The transconductors comprise two complementary differential pairs (P1/P2; N1/N2) whose outputs are connected directly to two output terminals (OA, OB). Two diodes (P3, N3) are arranged in series between the common terminals (BA, BB) of the differential pairs. The common-mode voltage of the differential pairs is available on the node (CM) between the two diodes (P3, N3). The common-mode voltage of the one transconductor (TR2) is used to control one of the bias current sources (P4) of the other transconductor (TR1) and, if desired, also that of the one transconductor (TR2). In this way the common-mode voltage on the output terminals (OA, OB) of the other transconductor (TR1) is fixed.