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US 5,347,236 AGranted
Modulator for negative pulse activated oscillators
AssigneeHoneywell Inc.
InventorsSteven D. Neuharth, James Lobsinger, Dean J. Janke
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AssigneeHoneywell Inc.
InventorsSteven D. Neuharth, James Lobsinger, Dean J. Janke
Estimating the term…
A modulator for providing modulating voltages across the anode and cathode of a negatively pulsed magnetron includes a switch which, when activated, couples the modulating voltage source to the cathode terminal, a current regulator which maintains a constant current flow through the anode and cathode when the modulating voltage is applied, and a voltage control circuit that reduces an excessive time rate of voltage change across the switch caused by arcing across the anode-cathode gap. A filament power supply is provided which supplies filament current while isolating the modulating voltage at the cathode from high voltage sensitive components in the filament power supply.
A modulator for modulating an oscillator having an anode, a cathode, and a filament, the modulator including a voltage source having a first terminal coupled to the anode and a second terminal, a switch having an on state and an off state, a first terminal of the switch coupled to the second terminal of the voltage source and a second terminal of the switch coupled to the cathode, the voltage source, switch, and oscillator arranged in a manner for current to flow between the anode and cathode when the switch is in the on state and for current not to flow between the anode and cathode when the switch is in the off state, the modulator further including a current regulator having first and second terminals respectively coupled to said first and second terminals of the voltage source for controlling current flow between the anode and cathode when the switch is in the on state, characterized in that the modulator further comprises a voltage controller coupled between said second terminal of said switch and said cathode, said voltage controller constructed and arranged to control time rate of change of voltage across said switch.
Dependencies are inferred from the claim text.