Low power telemetry system and method
First Claim
Patent Images
1. A telemetry system comprising:
- a bus;
a plurality of channels each coupled to the bus; and
a control subsystem for (1) controlling the channels so that each one presents to the bus, during a time period designated for the channel, a channel characteristic representative of a signal sampled by the channel, (2) interrogating in the analog domain, during the time period designated for a channel, the characteristic presented by the channel, and (3) forming a signal representative of the characteristic presented by the channel during the designated time period.
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Abstract
A telemetry system is described in which a plurality of channels are coupled to a bus. A control subsystem controls the channels so that one of the channels presents to the bus during its designated time period a channel characteristic. The control subsystem interrogates in the analog domain each of the channels during its designated time period, and forms a signal representative of the channel characteristic. The control subsystem may combine one or more of the signals into a digital packet, and transmit the same over a network.
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Citations
86 Claims
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1. A telemetry system comprising:
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a bus;
a plurality of channels each coupled to the bus; and
a control subsystem for (1) controlling the channels so that each one presents to the bus, during a time period designated for the channel, a channel characteristic representative of a signal sampled by the channel, (2) interrogating in the analog domain, during the time period designated for a channel, the characteristic presented by the channel, and (3) forming a signal representative of the characteristic presented by the channel during the designated time period. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40)
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41. A method of telemetering one or more channels coupled to a bus comprising:
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controlling the channels so that each one presents to the bus, during a time period designated for the channel, a channel characteristic representative of a signal sampled by the channel;
interrogating in the analog domain, during the time period designated for a channel, the characteristic presented by the channel; and
forming a signal representative of the characteristic presented by the channel during the designated time period. - View Dependent Claims (42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66)
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67. A telemetry system comprising:
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a bus;
a plurality of channels each coupled to the bus; and
means for (1) controlling the channels so that each one presents to the bus, during a time period within a cycle designated for the channel, a channel characteristic representative of a signal sampled by the channel, (2) interrogating in the analog domain, during the time period designated for a channel, the characteristic presented by the channel, and (3) forming a signal representative of the characteristic presented by the channel during the designated time period.
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68. A termination device in a telemetry system comprising:
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a controller;
a probe pulse driver and receiver circuit for interrogating in the analog domain one or more channels in the telemetry system; and
a power and control driver for transmitting to one or more channels in the telemetry system one or more power signals and one or more control signals. - View Dependent Claims (69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79)
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80. A channel in a telemetry system comprising:
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a sample &
hold circuit for holding a sample of a signal;
a variable resistor circuit for presenting a variable impedance to one or more signal lines during a time period designated for the channel an impedance representative of the sample held by the sample &
hold circuit; and
a control element for controlling the variable resistor circuit to present to the one or more signal lines an open circuit equivalent impedance during times other than the time period designated for the channel. - View Dependent Claims (81, 82, 83, 84, 85, 86)
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Specification