Fsk receiver

Abstract From the Canadian patent

An FSK (Frequency Shift Keying) receiver capable of reducing the deterioration of sensitivity suppression ascribable to interference waves despite the use of an orthogonal detection type reception system. Mixers for generating baseband signals are followed by high pass filters, low pass filters and an, orthogonal detection modulator. The baseband signals from the mixers are each applied to respective one of the high pass filters while the output signals of the high pass filters are fed to the associated low pass filters. The demodulator processes the output signal of the low pass filters to produce a demodulated signal. The high pass filters attenuate the demodulated signals of interference …