Solid state disconnect device

Details Solid state disconnect device Solid state disconnect device

1976-09-10

1977-09-13

Miller, Jr., Stanley D.

179 81R, 357 20, 357 51, H01L 2980

Patent

active

040486478

ABSTRACT:
A solid state disconnect or isolating device for disconnecting a subscriber on his premises, replaces a relay with associated circuitry and items. It can be coupled with a surge protection device to provide disconnect signalling, plus loop testing if desired. The device comprises a normally "on" junction field effect transistor which acts as a pinch resistor.

REFERENCES:
patent: 3181033 (1965-04-01), Bakker
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patent: 3755722 (1973-08-01), Harland et al.
patent: 3801886 (1974-04-01), Imaizumi et al.
patent: 3890543 (1975-06-01), Jonassen
patent: 3975752 (1976-08-01), Nicolay
patent: 3977020 (1976-08-01), Enzlin et al.
patent: 3987253 (1976-10-01), Pipitone
D. Engling et al., "A Sing. Substr. Thin Film Active Tele. Net. Using TMM Caps. and Tant. Nitride Res.," Proc. 1970 Elec. Comp. Conf., Wash. D.C., (May 13-15, 1970), pp. 320-328.
K. Richardson, "Microelectronics Opens New Prospects for Station Apparatus," Telephony, vol. 184, No. 12, Mar. 19, 1973, pp. 51-55.

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