Systems and apparatuses for transmission over a common differential wire pair
AssigneeElectsol-DSP LLC
InventorJohn F. Silva
Life of this patent
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Abstract
A system for transmitting information from multiple remote devices over a common differential pair includes an interface and at least two transducers. The transducer is coupled to the remote device and, in response to a strobe signal from the interface, utilizes a latching thyristor and an LCR circuit to generate a pair of tuned, cycle-limited current pulses through the differential pair. The interface includes a strobe stage and an acquisition stage, and isolates the transducers from a microcontroller and power supply.
Claims9
A transducer coupled to an analog sensor, a positive and a negative differential line, and a strobe line, said transducer comprising:
- a) a transducer identifier circuit configured to conduct a first electrical impulse between said positive and said negative differential lines for a limited duration and in response to a signal on said strobe line, said transducer identifier circuit comprising a transducer identifier trigger circuit, a transducer identifier coupling circuit, and a transducer identifier conduction circuit, said transducer identifier conduction circuit having a thyristor with a gate receiving an output signal of said transducer identifier trigger circuit;
- and
- b) a sensor value circuit configured to selectively conduct a second electrical impulse between said positive and said negative differential lines for a limited duration and in response to a signal from said analog sensor, said sensor value circuit comprising a sensor value trigger circuit, a sensor value coupling circuit, and a sensor value conduction circuit, said sensor value conduction circuit having a thyristor with a gate receiving an output signal of said sensor value trigger circuit;
- wherein said transducer identifier circuit is preconfigured to conduct said first electrical impulse at a first time relative to said signal on said strobe line, and wherein said sensor value circuit conducts said second electrical impulse at a second time (i) relative to said first electrical impulse and (ii) corresponding to a magnitude of said analog sensor signal.
Dependencies are inferred from the claim text.