Reception and demodulation of widely spaced pulse position modulated signals

DETAILED DESCRIPTION What we claim is: 1.
A circuit for receiving and decoding information contained in a train of pulse position modulated signals comprising: (a) an antenna for receiving the train of pulse position modulated signals unaccompanied by clock signals; (b) a series tuned amplifier circuit having an input and an output, the amplifier input being coupled to the antenna for producing a train of amplified pulse position modulated signals at the output of the series tuned amplifier circuit; and (c) a decoder circuit having an input and an output, the decoder input being coupled to the amplifier output for decoding the train of amplified pulse position modulated signals and producing an amplitude modulated signal at the decoder output without utilizing transmitter synchronized clock signals.
2.
The circuit of claim 1 wherein the amplifier circuit further comprises an input power supply coupled to the amplifier through an isolation filter.
3.
The circuit of claim 1 wherein the antenna is capacitively coupled to the amplifier and inductively coupled to ground.
4.
A circuit for receiving and decoding information contained in a train of pulse position modulated signals comprising: a) an antenna for receiving the train of pulse position modulated signals unaccompanied by clock signals; b) an amplifier circuit having an input and an output, the input being coupled to the antenna for producing a train of amplified pulse position modulated signals at the output of the amplifier circuit; and c) a decoder circuit having an input and an output, the decoder input being coupled to the amplifier output for decoding the train of amplified pulse position modulated signals and producing an amplitude modulated signal at the decoder output without utilizing transmitter synchronized clock signals.
5.
The circuit of claim 1 wherein the decoder further comprises: a) a pulse position to pulse width modulator having an input and an output, the input being coupled to the amplifier output; and b) a pulse width to amplitude modulator having an input and an output, the input being coupled to the pulse position to pulse width modulator output thereby producing an amplitude modulated signal at the pulse width to amplitude modulator output