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"Transmission of documents via telephone wires is possible in principle, but the apparatus required is so expensive that it will never become a practical proposition."
Dennis Gabor, British physicist
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| Number | Title | Issue Date |
| 5754074 | Protected switch A protected switch has a power first semiconductor device having a first main electrode for coupling to a first voltage supply line, a second main electrode coupled to a first terminal for connection via a load to a second voltage supply line and an insul... | 05/19/1998 |
| 5661374 | LED light strip with brightness/current draw control circuitry A current consumption control system for controlling the current draw of an electric power-consuming device, e.g., a modular strip lighting unit for a lighting system including at least one said unit, in which the strip lighting unit includes at least one... | 08/26/1997 |
| 5347209 | Voltage control in pulsed system by predict-ahead control A method and apparatus for predict-ahead pulse-to-pulse voltage control in a pulsed power supply system is disclosed. A DC power supply network is coupled to a resonant charging network via a first switch. The resonant charging network is coupled at a nod... | 09/13/1994 |
| 4158803 | Switching high voltage power supply A circuit to provide a fast convenient means of amplifying a low level analog/digital signal to very high voltage to drive a large capacitance of a multi-colored cathode ray tube. The circuit employs two high voltage/frequency planar triodes to source and... | 06/19/1979 |
| 4054831 | Power supply turn-on and turn-off transient elimination circuits Power supply turn-on and turn-off transients are eliminated in power supplies employing thermionic vacuum tube pass devices and control amplifiers for controlling the output voltage of the power supply by controlling the conductance of the pass tube or tu... | 10/18/1977 |
