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High Voltage Photon Coupler

IP.com Disclosure Number: IPCOM000090428D
Original Publication Date: 1969-Apr-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 29K

Publishing Venue

IBM

Related People

Bresg, V: AUTHOR [+2]

Abstract

This device is for coupling two electrically isolated circuits by light. A circuit at a first potential V1 applies a signal to light-emitting diode 10. The light produced by diode 10 is transmitted through glass rod 12 and impinges on light sensitive diode 14. Diode 14 is thus rendered conductive, providing an input to the circuit at a second potential level V2. Heat sink 16 provides cooling for diode 10. Glass rod 12 is positioned inside glass tube 18 by insulating spacers 20. With a 12'' long glass rod submerged in oil, the potential difference between V1 and V2 is approximately 150 KV. The frequency response is limited only by the diodes used. DC as well as AC signals at near ground potential V1 are transmitted to a circuit at approximately 150 KV while maintaining electrical isolation.

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High Voltage Photon Coupler

This device is for coupling two electrically isolated circuits by light. A circuit at a first potential V1 applies a signal to light-emitting diode 10. The light produced by diode 10 is transmitted through glass rod 12 and impinges on light sensitive diode 14. Diode 14 is thus rendered conductive, providing an input to the circuit at a second potential level V2. Heat sink 16 provides cooling for diode
10. Glass rod 12 is positioned inside glass tube 18 by insulating spacers 20. With a 12'' long glass rod submerged in oil, the potential difference between V1 and V2 is approximately 150 KV. The frequency response is limited only by the diodes used. DC as well as AC signals at near ground potential V1 are transmitted to a circuit at approximately 150 KV while maintaining electrical isolation. A current transfer ratio Iout/Iin equal to .003 and a pulse rise time of t equal to 100 nanoseconds is obtained.

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