Abstract: An arrangement for measuring the temperature of an electronic circuit, the arrangement comprising a measuring element being in close thermal communication with the electronic circuit, which measuring element comprises a temperature-dependent component in each one of at least two current paths and whose current-voltage characteristic is dependent on the temperature in accordance with a different predetermined function in at least two of the current paths, which temperature-dependent components can each be impressed with a predetermined current for generating a voltage dependent on the temperature at each one of the temperature-dependent components, and an evaluation circuit for forming an output voltage representing a measure of the temperature of the electronic circuit from the difference of the voltages at the temperature-dependent components.

Abstract: An arrangement for measuring the temperature of an electronic circuit, the arrangement comprising

Abstract: In radio receivers, ceramic filters are used for filtering the received frequency band. The limitation of the frequency band in the higher frequency range leads to an asymmetrical crosstalk between the right and left audio channel after decoding in the stereo decoder. These transmission errors are compensated by an adjustable high-pass filter. This high-pass filter precedes the stereo decoder. High-pass filters using potentiometers cannot be integrated. Furthermore, ageing phenomena occur in potentiometers so that the transfer function changes. A high-pass filter with a variable capacitor can neither be integrated easily. Therefore, an arrangement is used in which, after a first amplification of the signal to be filtered, this signal is divided into two signal currents and the amplitude and phase of a sub-current are corrected. This corrected sub-current is added to the main current at a sum node. The sub-current is applied via a voltage divider unit to an amplifier stage having a plurality of inputs.

Abstract: A circuit for reducing the distortion in an FM quadrature demodulator. A non-linear circuit stage is connected after the quadrature demodulator, whose characteristic has an inverse curve form like the demodulator characteristic. If the FM quadrature demodulator uses a resonant circuit to generate a frequency-dependent phase shift and has two outputs in phase opposition, the non-linear circuit stage can be formed by two diode branches through which the output currents of the quadrature demodulator flow. The voltage difference at these two diode branches supplies the output signal with the non-linear distortions largely removed.