CN205725685U

CN205725685U - Periodic pulse signal based on programmable logic chip detects protection module automatically

Info

Publication number: CN205725685U
Application number: CN201620558823.0U
Authority: CN
Inventors: 钟景华; 蒋振立
Original assignee: NANJING GLARUN-ATTEN TECHNOLOGY Co Ltd
Current assignee: NANJING GLARUN-ATTEN TECHNOLOGY Co Ltd
Priority date: 2016-06-12
Filing date: 2016-06-12
Publication date: 2016-11-23
Anticipated expiration: 2026-06-12

Abstract

This utility model relates to a kind of periodic pulse signal based on programmable logic chip and automatically detects protection module; including changer, enumerator, pulse period depositor, pulse width register, comparator, input signal has sampling clock, detected pulse, depositor reset signal: changer is that the tested periodic pulse signal of input is converted to narrow pulse signal Tong Bu with tested periodic pulse signal, that width is equal to the clock cycle；Enumerator is the counting carrying out detected pulse under sampling clock triggers；Pulse period depositor preserves the pulse cycle value of tested periodic pulse signal.Pulse width register preserves the pulse width measuring value of tested periodic pulse signal.Comparator is pulse period depositor, the data of pulse width register to be compared with pulse period, the pulse width typical data of setting in real time; when deviation is beyond set point; output control signal turns off the pumping signal input of radio-frequency devices, protection radio-frequency devices and rear class device.

Description

Periodic pulse signal based on programmable logic chip detects protection module automatically

Technical field

This utility model relates to a kind of protection module of detection automatically, particularly relates to a kind of week based on programmable logic chip Phase pulse signal detects protection module automatically.

Background technology

When radio-frequency devices (such as transmitter, power amplifier) works, the rf excitation signal of input is loaded with modulation arteries and veins When rushing signal, modulated pulse signal is generally periodically pulsing signal, and the parameter such as pulse period and pulse width is radio frequency The representative value of device work, time as bigger in parameter actual value and representative value deviation, can cause radio-frequency devices or the damage of rear class device Bad.The initial stage occur in pulse parameter and representative value deviation, detection is abnormal and automatic output control signal trigger protection is ten in time Divide necessity.

Utility model content

Provide a kind of when radio-frequency devices load-modulate pulse signal works for problem above this utility model, can Automatically to detect the parameter of modulated pulse signal, when pulse parameter is beyond application indexes, can trigger by automatic output control signal The periodic pulse signal automatic detecting protector of protection.

Techniques below scheme is taken: a kind of based on programmable logic chip in order to solve problem above this utility model Periodic pulse signal detects protection module automatically, it is characterised in that: include changer, enumerator, pulse period depositor, pulse Width register, comparator,

Input, the operation level that signal level is programmable logic chip of output, input signal has sampling clock, tested Survey pulse, depositor reset signal: sampling clock is produced by clock circuit；The tested cycle arteries and veins that detected pulse is an externally input Rush signal；Depositor reset signal is produced by peripheral circuit-reset circuit；Output signal has control signal: control signal is for penetrating Frequently the pumping signal input of device enables and controls；

Changer is the tested periodic pulse signal of input to be converted to, width Tong Bu with tested periodic pulse signal be equal to The narrow pulse signal of clock cycle, for counter reset signal, interval in reset signal burst pulse, counter O reset；

Enumerator is the counting carrying out detected pulse under sampling clock triggers；

Pulse period depositor preserves the pulse cycle value of tested periodic pulse signal.When module powers up, pulse week Phase depositor reset signal produces, and makes pulse period depositor reset.Trigger when detected rising edge of a pulse, make the pulse period Depositor is equal to Counter Value, and now pulse period register value is latched, until brush when being next time detected rising edge of a pulse New data.

Pulse width register preserves the pulse width measuring value of tested periodic pulse signal.When module powers up, depositor Reset signal produces, and makes pulse width register reset.Trigger when detected pulse falling edge, make pulse width register etc. In Counter Value, now pulse width register value is latched, until refresh data when being next time detected pulse falling edge.

Comparator is in real time by pulse period depositor, data and the pulse period of setting, the arteries and veins of pulse width register Rushing width typical data to compare, when deviation is beyond set point, output control signal turns off the excitation letter of radio-frequency devices Number input, protection radio-frequency devices and rear class device.

Programmable logic chip uses the CPLD chip of LATTICE company, and model is LC4256V-75T144I.

Clock circuit uses HXO-36B active crystal, and frequency is 10MHz

Described peripheral circuit-reset circuit includes that resistance R, electric capacity C, resistance R connect with electric capacity C, the other end of resistance R Meet another termination GND of VCC, electric capacity C.

The periodic pulse signal based on programmable logic chip realization that this utility model provides detects protection module automatically, When radio-frequency devices load-modulate pulse signal works, can automatically detect the parameter of modulated pulse signal, work as pulse parameter During beyond application indexes, can automatic output control signal trigger protection.

Accompanying drawing explanation

Fig. 1 is this utility model system principle diagram.

Fig. 2 is peripheral circuit in this utility model-reset circuit schematic diagram.

Detailed description of the invention

The utility model is described in more detail below in conjunction with the accompanying drawings.

Automatically examine as it is shown in figure 1, this utility model provides a kind of periodic pulse signal based on programmable logic chip Survey protection module, including changer, enumerator, pulse period depositor, pulse width register, comparator,

Clock circuit uses HXO-36B active crystal, and frequency is 10MHz

As in figure 2 it is shown, described peripheral circuit-reset circuit includes that resistance R, electric capacity C, resistance R connect with electric capacity C, electricity Another termination GND of another termination VCC, electric capacity C of resistance R.Indicating resistance R in figure is 100k Ω, and electric capacity C is 0.1uF, can add Produce the low level of 10mS during electricity, be high level when stablizing, the demand of depositor reset signal can be met.

The foregoing is only preferred embodiment of the present utility model, be not restricted to this utility model, for ability For the technical staff in territory, this utility model can have various modifications and variations.All spirit of the present utility model and principle it In, any modification, equivalent substitution and improvement etc. made, within should be included in right of the present utility model.

Claims

1. a periodic pulse signal based on programmable logic chip detects protection module automatically, it is characterised in that: including can Programmed logic chip, changer, enumerator, pulse period depositor, pulse width register, comparator,

Input, the operation level that signal level is programmable logic chip of output, input signal has sampling clock, detected arteries and veins Punching, depositor reset signal: sampling clock is produced by clock circuit；The tested recurrent pulse letter that detected pulse is an externally input Number；Depositor reset signal is produced by peripheral circuit-reset circuit；Output signal has control signal: control signal is radio-frequency (RF) device The pumping signal input of part enables and controls；

Changer is the tested periodic pulse signal of input to be converted to, width Tong Bus with tested periodic pulse signal be equal to clock The narrow pulse signal in cycle, for counter reset signal, interval in reset signal burst pulse, counter O reset；

Pulse period depositor is for preserving the pulse cycle value of tested periodic pulse signal；

Pulse width register is for preserving the pulse width measuring value of tested periodic pulse signal；

Comparator is in real time by pulse period depositor, data and the pulse period of setting, the pulse width of pulse width register Degree typical data compares.

Periodic pulse signal based on programmable logic chip the most according to claim 1 detects protection module automatically, its It is characterised by: programmable logic chip uses the CPLD chip of LATTICE company, and model is LC4256V-75T144I.

Periodic pulse signal based on programmable logic chip the most according to claim 1 detects protection module automatically, its It is characterised by: clock circuit uses HXO-36B active crystal, and frequency is 10MHz.

Periodic pulse signal based on programmable logic chip the most according to claim 1 detects protection module automatically, its It is characterised by: described peripheral circuit-reset circuit includes that resistance R, electric capacity C, resistance R connect with electric capacity C, another of resistance R Another termination GND of termination VCC, electric capacity C.

Periodic pulse signal based on programmable logic chip the most according to claim 4 detects protection module automatically, its Being characterised by: described resistance R is 100k Ω, electric capacity C is 0.1uF.