Abstract:
The invention relates to a circuit arrangement based on the lengthening of the control trace by means of a voltage divider R1 and R2, which supplies a split control voltage in the ratio R1 /(R1 + R2) to the gate-electrode of the second working transistor AT2. Said lengthening however only relates to the steep part of the control trace. Accordingly, the invention is provided with first and second switching units in order to correctly apply the inception voltage and to dramatically shorten and correctly position the lengthened flat upper part of the control characteristic curve. In addition leakages from the inception voltages are collected or compensated, instead of being multiplied by the divider circuits.
Abstract:
A mixer includes two transistor circuits, two control inputs, two RF inputs and two IF outputs, wherein, for switch-support, there are provided positive feedback elements and impedance elements, by which intermodulation strength, stability and noise performance of the mixer circuit are improved.
Abstract:
The power semiconductor module has a number of parallel IGBT-chips (2,3) with their emitter conductor paths (4), base conductor paths (5) and collector conductor paths (1) at least partially provided in common, with a slit (12) provided in one of these conductor paths. The conductor paths are applied to a ceramics substrate (10), with the slit provided simultaneous with the formation of the conductor paths, or provided subsequently via an etching process.
Abstract:
A voltage divider (R1, R2) is connected between the control voltage terminal (R) and the gate electrode of the second working transistor (AT2). A first circuit connected with the control voltage terminal (R) connects the voltage divider for operation, above a first given threshold voltage. A second circuit connected to this terminal (R) de-activates the potential divider (R1, R2) connection above a second threshold, which is greater than the first.
Abstract:
The integrated component has an oscillation circuit with a capacitance value determined via a tuning diode, a second compensation diode used for compensating the deviation in the resonance frequency of the oscillation circuit, resulting from the manufacturing tolerances. The compensation diode is controlled by a compensation voltage obtained from a reference voltage via a D/A converter (12) in dependence on a digital value held in a memory (17).
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.
Abstract:
The device has a main transistor (T1) for amplifying an HF signal coupled into a control connection (26) of the main transistor, an auxiliary transistor (T2) for working point adjustment for the main transistor and a low pass filter (30) connected between the control connection of the main transistor and a control connection of the auxiliary transistor.
Abstract:
The power semiconductor module has a number of parallel IGBT-chips (2,3) with their emitter conductor paths (4), base conductor paths (5) and collector conductor paths (1) at least partially provided in common, with a slit (12) provided in one of these conductor paths. The conductor paths are applied to a ceramics substrate (10), with the slit provided simultaneous with the formation of the conductor paths, or provided subsequently via an etching process.