Traveling-wave-tube protection circuit专利检索-慢波结构电子零件及设备专利检索查询-专利查询网

Traveling-wave-tube protection circuit

阅读：509发布：2022-11-13

专利汇可以提供Traveling-wave-tube protection circuit专利检索，专利查询，专利分析的服务。并且A protection circuit to detect a malfunction condition of a traveling wave tube by monitoring both the current flowing from the slow-wave structure into the tube body and current flowing in the collector of the tube. The protection circuit produces a fault signal upon detection of current flowing in the body portion of the tube which exceeds a predetermined threshold, or upon detection of current flowing in the collector which does not exceed a predetermined threshold. The fault signal thus generated is utilized to initiate shutdown of power to the traveling wave tube, thereby protecting the traveling wave tube from distructive current. A feature of this invention is an improved d.c. restorer circuit utilizing a differential amplifier in conjunction with diode feedback to charge a capacitor to a voltage essentially equal to the most negative going excursion of an input signal. This voltage stored in the capacitor is added to the voltage applied at the input of the restorer to produce the restored voltage at its output.，下面是Traveling-wave-tube protection circuit专利的具体信息内容。

权利要求

1. A protection circuit for an electronic device having a current path within said device comprising: a transformer having a primary and a secondary winding, means connecting said primary winding serially with said current path; a d.c. restorer circuit having an input coupled to said secondary winding; a comparator circuit coupled to the output of said d.c. restorer circuit and having a reference voltage generator which produces a predetermined voltage representative of current desired in said path, and providing an output signal when the voltage at the output of said restorer circuit exceeds said reference voltage; an integrator having an input connected to the output of said comparator and providing an output signal when said comparator output signal remains present for longer than a predetermined period of time; and protection means coupled to said integrator and responsive to an output signal therefrom for shutting off power to said device.

2. A protection circuit for an electronic device having a plurality of current paths within said device, comprising: a plurality of detection paths, each path including a transformer having a primary and a secondary winding, said primary being connected serially with one of said current paths; a d.c. restorer circuit having an input coupled to said secondary winding; a comparator circuit coupled to the output of said d.c. restorer circuit and having a reference voltage generator which produces a predetermined voltage representative of current desired in said path, and providing an output signal when the voltage at the output of said restorer circuit exceeds said reference voltage; an integrator having an input connected to the output of said comparator and providing an output signal when said comparator output signal remains present for longer than a predetermined period of time, the output of said integrator forming the output of said detection path; a decision circuit having a plurality of input terminals, and connections between different outputs of said detection paths to different input terminals of said decision circuit, said decision producing an output signal upon the occurence of a signal present at least one of said input terminals of said decision circuit; and protection means of shutting off power to said device upon occurence of said decision circuit output signal.

3. A protection circuit in accordance with claim 2 wherein there is provided a power supply current in each current path between said primary winding and an element of said electronic device.

4. A protection circuit in accordance with claim 3 wherein said electronic device is a traveling-wave tube and said current paths include a body current path and a collector current path.

5. A protection circuit in accordance with claim 2 wherein said electronic device is a traveling-wave tube.

6. A protection circuit in accordance with claim 4 wherein said protection means includes means to terminate power to the grid, body, and collector of said traveling wave tube.

7. A protection circuit according to claim 1 wherein said d.c. restorer comprises: a first differential amplifier having an inverting input, a non-inverting input, and an output; a second differential amplifier having an inverting input, a non-inverting input, and an output; reference voltage means; capacitive means connected between said inverting input of said first amplifier and said reference voltage means; a first signal path interconnecting said inverting terminal of said first amplifier with said inverting terminal of said second amplifier, said first signal path including a resistance; a second signal path interconnecting said non-inverting input of said first amplifier with said non-inverting input of said amplifier, said second signal path including an attenuation network; a first feedback path interconnecting said output of said first amplifier with said inverting input of said first amplifier, said feedback path including a normally open voltage-controlled switch which opens whenever the current therethrough becomes less than a predetermined amount and closes whenever a predetermined voltage is applied thereto; and a resistive feedback path interconnecting said output of said second amplifier with said inverting input of said second amplifier, whereby a periodic electrical signal, when applied to said non-inverting input of said first amplifier, will have added to it a constant d.c. level and the resultant signal shall be present at said output of said second amplifier.

8. The d.c. restorer of claim 7 wherein said capacitative means comprises a capacitance and resistance in parallel.

9. The d.c. restorer of claim 7 wherein said reference voltage means is ground.

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