Phonak Communications Ag

Anton Bartschi

Francois Callias

A micro-receiver for receiving a high frequency frequency modulated or phase modulated signal, including a single integrated circuit in BiCMOS technology and on which is integrated a high frequency amplifier, an oscillator, a modulator, an intermediate frequency filter, an intermediate frequency amplifier, a demodulator, a low pass filter and a low frequency amplifier. The integrated circuit includes in addition a muting or squelch circuit, a voltage multiplier as well as a standby circuit. The circuits working in a lower frequency range are implemented in CMOS technology, and operated in a very energy-saving way with a single-cell battery with a low battery voltage of 1.3 V. The voltage multiplier provides a higher operating voltage for the circuits working in a higher frequency range. Because of the high degree of integration made possible by implementing the intermediate frequency and low frequency circuits in CMOS technology, it is possible to dispose the receiver, including a battery and earphone, in a housing which can be inserted into the external auditory canal of a person.

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St. Antoni, Switzerland

Anton Bartschi