An integrated FSK Demodulator with Built-In Self-Calibration

Conference: ANALOG '06 - 9. ITG/GMM-Fachtagung
09/27/2006 - 09/29/2006 at Dresden, Germany

Proceedings: ANALOG '06

Pages: 6Language: englishTyp: PDF

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Teichmann, Peter; Gille, Klaus (IMMS gGmbH, Erfurt, Germany)
Peter, Jeff; Laute, Andreas (Melexis GmbH, Erfurt, Germany)

This paper presents a fully-integrated FSK demodulator circuit. It is based on the phase coincidence demodulator principle and employs an injection-locked oscillator as phase shifter. It contains a digital self-calibration circuit and an AFC loop with dead-band. The FSK demodulator was realized in a 0.6 µm BiCMOS process. It uses an IF frequency of 2 MHz and consumes 320 muA from a supply voltage between 1.9 V and 5.5 V. This makes it well suitable for receiver/transceiver ICs targeted at the world-wide license-free ISM/SRD bands.