Receiver for signal communication apparatus and related signal communication apparatus

A receiver, comprising:

• an input stage configured to receive a coded signal transmitted over a wireless interface and to output a differential signal based on the received coded signal, wherein the received coded signal is coded by a pair of pulses comprising a first coding pulse having a polarity and a second coding pulse having a polarity opposite of the polarity of the first coding pulse and a same duration and a same absolute amplitude as the first coding pulse;
• and a decoder coupled to the input stage and configured to decode the differential signal, the decoder including:
• a triggering block capable of triggering the decoder when a value of the received coded signal is outside a logical hysteresis, the triggering block being configured to:
• compare a first signal component of the differential signal to a first threshold above a direct current component of the differential signal and to a second threshold below the direct current component of the differential signal;
• compare a second signal component of the differential signal to the first threshold and the second threshold;
• generate a plurality of decoding logic signals based on the comparisons;
• and selectively trigger decoding based on an order of the generated plurality of decoding logic signals, wherein the triggering block comprises a pulse generator configured to generate logic pulses based on the order of the plurality of decoding logic signals and a window generator configured to set up a time period starting from a generation of a first logic pulse by said pulse generator due to generation of a first set of decoding logic signals, said window generator configured to check whether within said time period a second logic pulse is generated, following the first and due to the generation of a second set of decoding logic signals, and to trigger said decoding of the differential signal when a result of the check is positive.

A system, comprising:

• an antenna configured to receive coded signals;
• and a decoder coupled to the antenna and configured to decode received coded differential signals, wherein the received coded signals are coded by pairs of pulses, each pair comprising a first coding pulse and a second coding pulse having a polarity opposite of a polarity of the first coding pulse and a same duration and a same absolute amplitude as the first coding pulse, the decoder including a triggering block capable of triggering the decoder when a value of the received coded signal is outside a logical hysteresis, the triggering block being configured to:
• compare a first signal component of a differential signal to a first threshold above a direct current component of the differential signal and to a second threshold below the direct current component of the differential signal;
• compare a second signal component of the differential signal to the first threshold and the second threshold;
• generate a plurality of decoding logic signals based on the comparisons;
• and selectively trigger decoding based on an order of the generated plurality of decoding logic signals, wherein the triggering block is configured to trigger decoding when the order of the plurality of decoding logic signals indicates:
• the first signal component is above the first threshold while the second signal component is below the second threshold at a first instant;
• and within a period of time following the first instant, the first signal component is below the second threshold while the second signal component is above the first threshold.

A system, comprising:

• a transmitter configured to code signals for transmission;
• a wireless interface comprising a first antenna configured to receive coded signals and a second antenna coupled to the transmitter;
• and a decoder coupled to the first antenna and configured to decode received coded differential signals, wherein the received coded signals are coded by pairs of pulses, each pair comprising a first coding pulse and a second coding pulse having a polarity opposite of a polarity of the first coding pulse and a same duration and a same absolute amplitude as the first coding pulse, the decoder including a triggering block configured to:
• compare a first signal component of a differential signal to a first threshold above a direct current component of the differential signal and to a second threshold below the direct current component of the differential signal;
• compare a second signal component of the differential signal to the first threshold and the second threshold;
• generate a plurality of decoding logic signals based on the comparisons;
• and selectively trigger decoding based on an order of the generated plurality of decoding logic signals, wherein said transmitter comprises four switches in a bridge configuration coupled between a supply voltage and a ground and having middle points coupled to the second antenna, said transmitter configured to generate at a positive side of a clock signal a pulse of substantially a same duration as that of a current pulse to be transmitted, said pulse being at an input with a data signal of a demultiplexer comprising four AND ports, said demultiplexer configured to generate four signals for driving the switches according to a logic level of the data signal to be transmitted.

A system, comprising:

• a transmitter configured to code signals for transmission;
• a wireless interface comprising a first antenna configured to receive coded signals and a second antenna coupled to the transmitter;
• and a decoder coupled to the first antenna and configured to decode received coded differential signals, wherein the received coded signals are coded by pairs of pulses, each pair comprising a first coding pulse and a second coding pulse having a polarity opposite of a polarity of the first coding pulse and a same duration and a same absolute amplitude as the first coding pulse, the decoder including a triggering block capable of triggering the decoder when a value of the received coded signal is outside a logical hysteresis, the triggering block being configured to:
• compare a first signal component of a differential signal to a first threshold above a direct current component of the differential signal and to a second threshold below the direct current component of the differential signal;
• compare a second signal component of the differential signal to the first threshold and the second threshold;
• generate a plurality of decoding logic signals based on the comparisons;
• and selectively trigger decoding based on an order of the generated plurality of decoding logic signals, wherein the triggering block comprises a pulse generator configured to generate logic pulses based on the order of the plurality of decoding logic signals and a window generator configured to set up a time period starting from a generation of a first logic pulse by said pulse generator due to generation of a first set of decoding logic signals, said window generator configured to check whether within said time period a second logic pulse is generated, following the first and due to the generation of a second set of decoding logic signals, and to trigger said decoding of the differential signal when a result of the check is positive.

A method, comprising:

• comparing a first signal component of a differential signal to a first threshold above a direct current component of the differential signal and to a second threshold below the direct current component of the differential signal, wherein the differential signal is coded with a first signal pulse having a polarity, a duration and an amplitude and a second signal pulse having a polarity opposite of the first signal pulse, a same duration as the first signal pulse and a same absolute amplitude as the first signal pulse;
• comparing a second signal component of the differential signal to the first threshold and the second threshold;
• generating a plurality of decoding logic signals based on the comparisons;
• and controlling decoding of the differential signal based on an order of the generated plurality of decoding logic signals, wherein the controlling decoding comprises triggering decoding when a value of a received coded signal is outside a logical hysteresis by triggering decoding when the order of the plurality of decoding logic signals indicates:
• the first signal component is above the first threshold while the second signal component is below the second threshold at a first instant;
• and within a period of time following the first instant, the first signal component is below the second threshold while the second signal component is above the first threshold.

A system, comprising:

• means for decoding differential signals coded with a first signal pulse having a polarity, a duration and an amplitude and a second signal pulse having a polarity opposite of the first signal pulse, a same duration as the first signal pulse and a same absolute amplitude as the first signal pulse;
• means for comparing each of two signal components of coded differential signals to first and to second logic thresholds, the first logic threshold having a value larger than a value of a direct current component of the differential signals and the second logic threshold having a value smaller than the value of the direct current component of the differential signals;
• and means for controlling the means for decoding based on the comparisons, wherein the means for controlling is capable of triggering the means for decoding when a received coded signal is outside a logical hysteresis and comprises:
• means for generating a first plurality of decoding logic signals based on the comparisons;
• means for generating a second plurality of decoding logic signals based on the comparisons;
• means for generating a first logic pulse signal based on the first plurality of decoding logic signals;
• means for generating a second logic pulse signal based on the second plurality of decoding logic signals;
• and means for enabling decoding based on the first and second logic pulse signals.