Thermally coupled information transmission across electrical isolation boundaries
First Claim
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1. An electro-thermal isolator comprising:
- a substrate having first, second and third electrically isolated regions;
thermal transmitting means in a said first region for receiving an electrical input signal and generating a transmitted thermal signal in response to said electrical input signal;
first thermal receiving means in said second region for receiving said transmitted thermal signal and generating a first electrical output signal;
second thermal receiving means in said third region for receiving said transmitted thermal signal and generating a second electrical output signal; and
error means in said substrate for comparing said second electrical output signal with said electrical input signal and adjusting the generating of said transmitted thermal signal.
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Abstract
An electro-thermal isolator coupler including a pair of electrically isolated thermal receivers specifically spaced from an electrically isolated thermal transmitter such that their combined signals will produce a thermally compensated electrical output. A second pair of electrically thermal receivers is included in an error circuit which corrects the driver of the thermal transmitter for losses across the thermal coupler. Depending upon the use, the thermal coupler can be used in combination with RF capacitive coupling. Individual power terminals for the electrically isolated regions assure electric isolation.
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Citations
17 Claims
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1. An electro-thermal isolator comprising:
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a substrate having first, second and third electrically isolated regions; thermal transmitting means in a said first region for receiving an electrical input signal and generating a transmitted thermal signal in response to said electrical input signal; first thermal receiving means in said second region for receiving said transmitted thermal signal and generating a first electrical output signal; second thermal receiving means in said third region for receiving said transmitted thermal signal and generating a second electrical output signal; and error means in said substrate for comparing said second electrical output signal with said electrical input signal and adjusting the generating of said transmitted thermal signal. - View Dependent Claims (2, 3, 4)
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5. An interface integrated circuit comprising:
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first port means, in a first portion of an integrated circuit and including first and second circuits, for receiving and transmitting signals; second port means, in a second portion of said integrated circuit and including third and fourth circuits, for receiving and transmitting signals; isolation means for electrically isolating said first and second portions of said integrated circuit; thermal means including a thermal transmitter and receiver connected to said first and third circuits for thermally coupling said first and third circuits across said isolation means; and high voltage capacitor means connected to said second and fourth circuits for electrically coupling said second and fourth circuits across said isolation means. - View Dependent Claims (6, 7, 8, 9, 10, 11)
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12. A subscriber-line interface circuit comprising:
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a substrate having a subscriber portion and a line portion electrically isolated from each other; first transmitter means in said line portion for receiving a first analog input signal and generating a first high frequency transmitted electrical signal; first receiver means in said subscriber portion for receiving said first transmitted electrical signal said first transmitter means and generating a first analog output signal; first high voltage capacitor means for electrically coupling said first transmitter and receiver means across said isolation; second transmitter means in said line portion for receiving a second input signal and generating a first transmitted thermal signal; and second receiver means in said subscriber portion for receiving said first transmitted thermal signal and generating a second output signal. - View Dependent Claims (13, 14, 15, 16, 17)
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Specification