2 21 in fig4 also one possible realization of the discriminator phase shift network h f 117 is shown for a 9 ghz if which is the frequency used in our receiver referring to fig1 closing the switch sw 1 114 and opening switches sw 2 115 and sw 3 116 configures the detector as an am product detector as shown in fig4 closing sw 2 115 and sw 3 116 and opening sw 1 114 configures the detector as a delay line fm detector as shown in fig8 fig1 is the most general receiver architecture described it supports three different modulations complex iq modulation schemes ask am and fsk fm with switches swi 124 and swq 127 closed and the others open the architecture provides iq demodulation with swam 125 closed and the others open am demodulation is provided with swfm 126 closed and the others open fm demodulation is provided with both swam 125 and swfm 127 closed and the others open simultaneous am and fm demodulation is provided which potentially increases the non coherent data rate by a factor of two although not explicitly shown it should be understood that the improved ask am detector of fig4 could be used in fig1 by providing amplifiers with matched delays in the ask am mixer signal paths for simultaneous am and fm demodulation the am detector should be as frequency insensitive as possible to limit leakage.