Integrated circuit arrangement for demodulating an amplitude modulated high frequency signal

Claim 1

An integrated circuit for demodulating an amplitude modulated high frequency signal, including demodulating means comprising an emitter-connected transistor, the demodulating transistor having emitter, collector and base electrodes and conducting a small idling output current in the absence of a high frequency signal relative to its output current at full high frequency signal, input means connected to the base electrode of the demodulating transistor for supplying an amplitude modulated high frequency signal, and output means connected to the collector electrode of the demodulating transistor for providing the demodulated signal, said integrated circuit comprising a source oF supply voltage, an asymmetrical conductor comprising a transistor of the same conductivity type as the demodulating transistor connected to the source of supply voltage and having a collector electrode and a base electrode connected to each other, the asymmetrical conducting transistor having a voltage drop due to the supply voltage, and a resistance network connected between the collector electrode of the asymmetrical conducting transistor and the base electrode of the demodulating transistor for reducing the voltage and applying the voltage drop to the demodulating transistor whereby the voltage drop provides a stabilization which renders the magnitude of the current independent from temperature fluctuations in the demodulating transistor.