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Ferrite switch driver with self-feedback latch switch-off function

A switch driver and ferrite technology, applied in electronic switches, electrical components, pulse technology, etc., can solve problems such as reduced reliability, program runaway, and device failure, and achieve reduced switching losses, simple circuits, and reduced power consumption. heat effect

Pending Publication Date: 2020-06-26
中国电子科技集团公司第九研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Therefore, the technical problem to be improved by the present invention is: to realize the real-time high-speed driving performance of the ferrite switch, the ferrite switch driver controlled by traditional FPGA and CPLD is expensive and difficult to purchase, and the latch-up effect may occur after being disturbed, At the same time, there are many internal logic gates in FPGA and CPLD, which are vulnerable to the influence of cosmic radiation, resulting in the accumulation effect of radiation dose and the single event flipping effect of high-energy particle collision, which will lead to device failure or program runaway, which will lead to reduced reliability.

Method used

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  • Ferrite switch driver with self-feedback latch switch-off function
  • Ferrite switch driver with self-feedback latch switch-off function
  • Ferrite switch driver with self-feedback latch switch-off function

Examples

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Effect test

Embodiment 1

[0041] Example 1: see figure 1 , a self-feedback latch-off ferrite switch driver, comprising a logic conversion circuit, a driver amplifier circuit, an H-bridge power drive circuit, and a comparator feedback circuit;

[0042] The logic conversion circuit is used to receive the upper-level control signal and the feedback signal output by the comparator feedback circuit, and output two paths A1 and A2, wherein the upper-level control signal, the feedback signal, A1 and A2 are all level signals, and satisfy The following conditions:

[0043] In the initial state, the superior control signal is 0, the feedback signal is 0, A1=0, A2=0;

[0044] When the superior control signal changes from 0 to 1, A1=0, A2=1, at this time, if the rising edge of the feedback signal comes, A1=0, A2=0;

[0045] When the superior control signal changes from 1 to 0, A1=1, A2=0, at this time, if the rising edge of the feedback signal comes, A1=0, A2=0;

[0046] The driver amplifier circuit is used to re...

Embodiment 2

[0049] Example 2: see Figure 2-Figure 4 , on the basis of Embodiment 1, the present embodiment 2 provides the specific circuit forms of the logic conversion circuit, the driver amplifier circuit, the H-bridge power drive circuit, and the comparator feedback circuit respectively, as follows:

[0050] The logic conversion circuit includes a D flip-flop U1A, an exclusive NOR gate U2A, a NOT gate U3A, an AND gate U4A, and an AND gate U4B; pin 2 of the D flip-flop U1A is connected to a superior control signal, pin 3 is connected to a feedback signal, and pin 4 is connected to a feedback signal. The feet are divided into two circuits, one is connected to the 5V power supply through the resistor R6, and the other is grounded through the capacitor C2; the 2 feet of the D flip-flop U1A are also connected to the 1A terminal of the XOR gate U2A and the AND gate U4B, and are connected to the AND gate through the NOT gate U3A The 1A terminal of U4A; the 2A terminal of the XOR gate U2A is ...

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Abstract

The invention discloses a ferrite switch driver with a self-feedback latch switch-off function. The ferrite switch driver comprises a logic conversion circuit, a driver amplifying circuit, an H-bridgepower driving circuit and a comparator feedback circuit. The logic conversion circuit receives a superior control signal and a feedback signal of the comparator feedback circuit, processes the signals, inputs the signals to the driver amplification circuit for amplification, and then inputs the signals to the H-bridge power drive circuit to drive the ferrite coil. Meanwhile, the comparator feedback circuit samples the current of the ferrite coil, and when the current reaches a preset value, the comparator feedback circuit sends a positive pulse to the logic conversion circuit to turn off theH-bridge power driving circuit. Under the condition that a microcontroller or an FPGA or a CPLD is not used, the ferrite coil can be effectively driven to the preset current, and automatic feedback and latch turn-off can be achieved. Compared with a ferrite switch driver using a microcontroller or an FPGA or a CPLD, the ferrite switch driver has the advantages of being simple in structure, lower in cost, higher in speed and higher in reliability.

Description

technical field [0001] The invention relates to a ferrite switch driver, in particular to a self-feedback latch-off ferrite switch driver. Background technique [0002] Ferrite switches have the function of changing microwave signal transmission channels, and are currently widely used in ground, airborne, and satellite radar communications. The ferrite switch is mainly composed of a microwave transmission line cavity, a ferrite material, a coil, and a driver, wherein the ferrite material and the coil are located inside the microwave transmission line cavity, and the driver is located outside the microwave transmission line cavity. As an important part of the ferrite switch, the driver’s main function is to receive the switching control signal of the upper switch, alternately generate pulse current excitation to the two directions of the single coil, change the microwave characteristics of the ferrite material, and then realize the channel of the microwave signal switch. Du...

Claims

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Application Information

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IPC IPC(8): H03K17/08H03K17/12
CPCH03K17/007H03K17/08H03K17/122
Inventor 赵勇白雪闫欢唐保权
Owner 中国电子科技集团公司第九研究所
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