摘要:
Ein Regelkreis besteht aus einer Differenzverstärkereinheit (100), einem der Differenzverstärkereinheit (100) nachgeschaltetem Emitterfolger (200) und einer Regeleinheit (300). Die Regeleinheit (300) regelt aus Regelgrößen (10, Ief) sowohl der Differenzverstärkereinheit (100) als auch des Emitterfolgers (200) zumindest eine Stellgröße (Ubias), die das Verhalten der Differenzverstärkereinheit und/oder des Emitterfolgers (200) bestimmt.
摘要:
A power amplifier system (100) includes a differential power amplifier (1 10) and a bias circuit (120). The differential power amplifier (110) is arranged for receiving a differential input pair to generate an output signal. The bias circuit (120) is arranged for generating a bias voltage to bias the differential power amplifier (110), and the bias circuit (120) comprises a source follower (122) for receiving a reference voltage to generate the bias voltage.
摘要:
Eine Verstärkeranordnung für Hochfreqzuenzsignale enthält einen Differenzverstärker (2) mit an den Emittern kapazitiv (12) gekoppelten Transistoren (10, 11). Der Differenzverstärker weist dadurch Hochpaßcharakteristik auf. Die Eingangssignale (SIG1, SIG1X) werden dem Differenzverstärker über je einen RC-Hochpaß (18, 19; 20, 21) zugeführt. Dadurch ergibt sich eine integrierbare Verstärkeranordnung mit starker Dämpfung für Basisbandsignalanteile und Bandpaßcharakteristik für hochfrequente Nutzsignalanteile.
摘要:
The invention relates to a circuit arrangement for an integrated output amplifier (1) with two constant current sources (2, 3), a voltage amplifier with two inputs (5, 6) and two outputs (7, 8) and two output transistors (Q1, Q2) coupled thereto and two feedback networks (9, 10) producing negative feedback between the output transistors and the input transistors of the voltage amplifier (4) allocated thereto. The first two feedback networks (9, 10) are connected between the collectors of the output transistors (Q1, Q2) and the base electrodes of the appropriate input transistors of the voltage amplifier (4). In addition there is a third feedback network (11) coupled on the input side to the base electrode of the output transistors and on the output side, via a transistor (Q3) acting as a current sink, to the input of a current distribution network (16) having a signal input (17). The current distribution network (16) has two parallel branches (18, 19) between which the current flowing through this network, controlled by the signal at the signal input (17) can be split, the branches (18 or 19) of the current distribution network (16) being connected on the one hand to the constant current sources (2 or 3) and on the other to the inputs of the voltage amplifier (4).
摘要:
The invention relates to an input buffer amplifier 1 suitable for a system on chip device. The input buffer amplifier 1 comprises a single ended input and a differential output. The input terminal is connected to a first differential stage 2 comprising two transistors T 1 , T 2 and to a second differential stage 3 comprising two transistors T 3 , T 4 . The first and second differential stages 2, 3 are further connected to a first and second load, for example current mirrors 10, 20, being connected so as to provide a differential output at the output terminals OUT P , OUT N .
摘要:
The invention relates to a circuit arrangement for an integrated output amplifier (1) with two constant current sources (2, 3), a voltage amplifier with two inputs (5, 6) and two outputs (7, 8) and two output transistors (Q1, Q2) coupled thereto and two feedback networks (9, 10) producing negative feedback between the output transistors and the input transistors of the voltage amplifier (4) allocated thereto. The first two feedback networks (9, 10) are connected between the collectors of the output transistors (Q1, Q2) and the base electrodes of the appropriate input transistors of the voltage amplifier (4). In addition there is a third feedback network (11) coupled on the input side to the base electrode of the output transistors and on the output side, via a transistor (Q3) acting as a current sink, to the input of a current distribution network (16) having a signal input (17). The current distribution network (16) has two parallel branches (18, 19) between which the current flowing through this network, controlled by the signal at the signal input (17) can be split, the branches (18 or 19) of the current distribution network (16) being connected on the one hand to the constant current sources (2 or 3) and on the other to the inputs of the voltage amplifier (4).