Abstract:
The invention relates to a circuit consisting of two regulatable amplification devices (DA, AA), the signal output (2) of the first amplification device (DA) being connected to the signal input (4) of the second amplification device (AA), and the first amplification device (DA) comprising a digital input (3) for regulating the amplification thereof and the second amplification device (AA) comprising an input (5) for the same purpose. According to the invention, the input (5) for regulating the amplification of the second amplification device (AA) is connected to the input (3) for regulating the amplification of the first amplification device (DA) by a specific means, in such a way that a change in the amplification of the second amplification device (AA) in one direction is caused by a change in the amplification of the first amplification device (DA) in the opposite direction, by means of regulation, such that the entire amplification remains essentially the same.
Abstract:
Output stage includes signal input (1), setting input (6) and signal output (3). There is first transistor pair (P11,12), whose transistors are coupled at first terminal (114,115) to circuit node (7), to which is linked first current source. First transistor pair is of first conductivity. Second transistor pair (N11,12) of second conductivity has its transistors coupled each with first terminal (111,112) of second circuit node (8), to which is linked second current source. Two current mirrors (4,5) of different conductivity are coupled to signal output and further connection details are specified. Independent claims are included for amplifying loop with invented output stage and for use of this output stage for amplifying radio signal.
Abstract:
A circuit arrangement includes two adjustable amplification devices where the signal output of the first amplification device is connected to the signal input of the second amplification device. The first amplification device has a digital input for controlling its gain and the second amplification device has an input for controlling its gain. The input for gain control in the second amplification device is connected to the input for controlling the gain of the first amplification device via a means such that a change in the gain of the second amplification device in one direction is effected by a change in gain, brought about by means of the control, in the first amplification device in the opposite direction such that the total gain remains essentially the same.
Abstract:
A circuit arrangement includes two adjustable amplification devices where the signal output of the first amplification device is connected to the signal input of the second amplification device. The first amplification device has a digital input for controlling its gain and the second amplification device has an input for controlling its gain. The input for gain control in the second amplification device is connected to the input for controlling the gain of the first amplification device via a means such that a change in the gain of the second amplification device in one direction is effected by a change in gain, brought about by means of the control, in the first amplification device in the opposite direction such that the total gain remains essentially the same.
Abstract:
Ausgangsstufe, umfassend: – einen Signaleingang (1), einen Stelleingang (6) und einen Signalausgang (3); – ein erstes Transistorpaar (P11, P12) mit einem ersten Leitfähigkeitstyp, wobei ein erster Transistor (P11) und ein zweiter Transistor (P12) des ersten Transistorpaares (P11, P12) mit jeweils einem ersten Anschluss (114, 115) an einen ersten Schaltungsknoten (7) angeschlossen sind; – eine erste Stromquelle, die an den ersten Schaltungsknoten (7) angeschlossen ist; – ein zweites Transistorpaar (N11, N12) mit einem zweiten Leitfähigkeitstyp, wobei ein erster Transistor (N11) und ein zweiter Transistor (N12) des zweiten Transistorpaares (N11, N12) mit jeweils einem ersten Anschluss (111, 112) an einen zweiten Schaltungsknoten (8) angeschlossen sind; – eine zweite Stromquelle, die an den zweiten Schaltungsknoten (8) angeschlossen ist; – einen ersten Stromspiegel (4) mit einem Stromspiegeltransistor (P22) von dem ersten Leitfähigkeitstyp, der mit dem Signalausgang (3) verbunden ist; – einen zweiten Stromspiegel (5) mit einem Stromspiegeltransistor (N22) von dem zweiten Leitfähigkeitstyp, der mit dem Signalausgang (3) verbunden ist; wobei – der Signaleingang (1) mit Steueranschlüssen der ersten Transistoren (P11, N11) des ersten und zweiten Transistorpaares verbunden ist; – der Stelleingang (6) mit Steueranschlüssen der zweiten Transistoren (P12, N12) des ersten und zweiten Transistorpaares verbunden ist; – ein zweiter Anschluss des zweiten Transistors (P12) des ersten Transistorpaares (P11, P12) mit dem zweiten Stromspiegel (5) verbunden ist und – ein zweiter Anschluss des zweiten Transistors (N12) des zweiten Transistorpaares (N11, N12) mit dem ersten Stromspiegel (4) verbunden ist, dadurch gekennzeichnet, dass der erste Transistor (P11, N11) und der zweite Transistor (P12, N12) von zumindest einem von dem ersten Transistorpaar (P11, P12) und dem zweiten Transistorpaar (N11, N12) unterschiedliche Geometrieparameter aufweisen.
Abstract:
A transistor device (10) has multiple counter-coupling resistors (18), one of which is assigned a switch so that the operation of switches via a control device (19) can selectively activate and deactivate counter-coupling resistors in the transistor device. As a result, a broadband amplifier can be implemented with high linearity.