CN103516366A - Input signal intensity indicator and indicating method - Google Patents
Input signal intensity indicator and indicating method Download PDFInfo
- Publication number
- CN103516366A CN103516366A CN201310446095.5A CN201310446095A CN103516366A CN 103516366 A CN103516366 A CN 103516366A CN 201310446095 A CN201310446095 A CN 201310446095A CN 103516366 A CN103516366 A CN 103516366A
- Authority
- CN
- China
- Prior art keywords
- signal
- voltage
- input signal
- threshold voltage
- analog
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Analogue/Digital Conversion (AREA)
Abstract
The invention discloses an input signal intensity indicator and an indicating method. The input signal intensity indicator can carry out quantification processing on the amplitude of input signals and output binary digit signals corresponding to the intensity of the input signals, a special analog-digital converter does not need to carrying out conversion from analog signals to digital signals, and accordingly the relationship of the amplitude of the input signals and output voltages does not need to be measured in advance, cost and structure complexity of the input signal indicator are lowered, and the whole processing course of the input signal intensity indicator is simplified.
Description
Technical field
The present invention relates to electronic circuit technology field, in particular, relate to a kind of input signal strength indicating device and indicating means.
Background technology
Received signal strength indicator device is a kind of circuit module common in radio-frequency transmitter, and it can indicate the intensity size that receives signal by input signal amplitude being converted into voltage or current signal.Circuit in traditional received signal strength indicator device is output as analog voltage or current signal, therefore need to use analog to digital converter that analog voltage or electric current are converted into the binary numeral that digital circuit can be identified, thereby further carry out the processing of digital baseband.
But, additional modulus converter in received signal strength indicator device, cost and the structure complexity of whole received signal strength indicator device have not only been increased, and must test in advance the relation obtaining between received signal strength indicator device amplitude output signal and output voltage, to facilitate the processing procedure of follow-up derivation input signal amplitude size, this just causes the whole processing procedure of received signal strength indicator device to compare very complicated.
Summary of the invention
In view of this, the invention provides a kind of input signal strength indicating device and indicating means, to overcome in prior art the problem due to the whole received signal strength indicator device cost that exists analog to digital converter to cause in received signal strength indicator device and complex structure and whole processing procedure very complicated.
For achieving the above object, the invention provides following technical scheme:
An indicating device, comprising:
Analog signal conversion, for being converted to input signal corresponding analog current signal; The range value of described analog current signal and described input signal is negative linear correlation;
Low-pass filter circuit, for described analog current signal is carried out to low-pass filtering treatment, and produces analog voltage signal; The parameter of described low-pass filter circuit is controlled by the first output valve of conversion control circuit;
Voltage comparator circuit, for the threshold voltage of described analog voltage signal and threshold voltage generation circuit generation is compared, and exports comparative result;
Threshold voltage generation circuit, for generation of the high value of threshold voltage and threshold voltage low value; The high value of described threshold voltage and the definite voltage range of described threshold voltage low value are controlled by the second output valve of described conversion control circuit;
Conversion control circuit, for exporting the first output valve or the second output valve according to the voltage ratio of described voltage comparator circuit compared with output control, and the output digital index signal corresponding with input signal amplitude.
Optionally, described analog signal conversion comprises N amplitude limiter and N+1 rectifier; Wherein, described amplitude limiter is for input signal is carried out to amplitude amplification, and described rectifier is for ac signal is converted to DC signal, and the DC signal of each rectifier output gathers generation analog current signal; Described N is positive integer.
Optionally, described low-pass filter circuit one end is connected with the output of described analog signal conversion, and one end ground connection comprises the electric capacity and the programmable resistance that are arranged in parallel.
Optionally, described voltage comparator circuit comprises the first comparison circuit and the second comparison circuit, described the first comparison circuit is for more described analog voltage signal and the high value of voltage threshold, and described the second comparison circuit is for more described analog voltage signal and voltage threshold low value.
Optionally, described threshold voltage generation circuit comprises two divider resistances that programmable current source and series connection arrange; Described programmable current source is controlled by the second output valve of described conversion control circuit.
Optionally, also comprise:
With the clock circuit that described conversion control circuit is connected, be used to described conversion control circuit that clock signal is provided.
Optionally, also comprise:
One end is connected with the output of described analog signal conversion, the programmable current mirror that one end is connected with described conversion control circuit, and described programmable current mirror is controlled by the 3rd output valve of described conversion control circuit.
An indicating means, is applied to, in above-mentioned input signal strength indicating device, comprising:
When described input signal amplitude is zero, conversion control circuit is set to maximum by the second output valve;
Conversion control circuit is carried out self calibration flow process;
Carry out input signal strength measurement procedure;
Export the digital index signal corresponding with input signal amplitude.
Optionally, described self calibration flow process comprises: in the situation that analog voltage signal is greater than the high value of threshold voltage, described conversion control circuit reduces the first output valve, and the resistance value that control reduces low-pass filter circuit is to reduce the numerical value of described analog voltage signal; In the situation that described analog voltage signal is less than threshold voltage low value, described conversion control circuit increases described the first output valve, controls the resistance value of the described low-pass filter circuit of increase to increase the numerical value of described analog voltage signal;
Repeat described self calibration flow process, until the numerical value of described analog voltage signal is positioned at the high value of described threshold voltage and the definite voltage range of threshold voltage low value.
Optionally, described self calibration flow process comprises: in the situation that analog voltage signal is greater than the high value of threshold voltage, described conversion control circuit reduces the 3rd output valve, controls and reduces analog current signal to reduce the numerical value of described analog voltage signal; In the situation that described analog voltage signal is less than threshold voltage low value, described conversion control circuit increases described the 3rd output valve, controls and increases analog current signal to increase the numerical value of described analog voltage signal;
Repeat described self calibration flow process, until the numerical value of described analog voltage signal is positioned at the high value of described threshold voltage and the definite voltage range of threshold voltage low value.
Optionally, described input signal strength measurement procedure comprises:
Described conversion control circuit is monitored analog voltage signal by voltage comparator circuit, when described analog voltage signal is less than threshold voltage low value, described conversion control circuit reduces the second output valve, and the electric current that control reduces described programmable current source is to reduce threshold voltage; When described analog voltage signal is greater than the high value of threshold voltage, described conversion control circuit increases described the second output valve, controls the electric current of the described programmable current source of increase to increase threshold voltage; Until the numerical value of described analog voltage signal is positioned at the high value of described threshold voltage and the definite voltage range of threshold voltage low value.
Optionally, before the output digital index signal corresponding with input signal amplitude, also comprise:
Conversion control circuit detects analog voltage signal in M clock cycle whether all in the high value of threshold voltage and the definite voltage range of threshold voltage low value, if so, enters the step of exporting the digital index signal corresponding with input signal amplitude; Described M is positive integer.
Known via above-mentioned technical scheme, compared with prior art, the embodiment of the invention discloses a kind of input signal strength indicating device and indicating means, described input signal strength indicating device can carry out quantification treatment by the amplitude of input signal, and the output binary digital signal corresponding with input signal strength, and do not need special-purpose analog to digital converter to carry out analog signal to the conversion of digital signal, thereby do not need to measure in advance the relation between input signal amplitude and output voltage yet, cost and the structure complexity of input signal indicating device have not only been reduced, and simplified the whole handling process of input signal strength indicating device.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only embodiments of the invention, for those of ordinary skills, do not paying under the prerequisite of creative work, other accompanying drawing can also be provided according to the accompanying drawing providing.
Fig. 1 is the electrical block diagram of the disclosed input signal strength indicating device of the embodiment of the present invention;
Fig. 2 is the circuit structure diagram of the disclosed analog signal conversion of the embodiment of the present invention;
Fig. 3 is the circuit structure diagram of the disclosed low-pass filter circuit of the embodiment of the present invention;
Fig. 4 is the circuit structure diagram of the disclosed voltage comparator circuit of the embodiment of the present invention;
Fig. 5 is the circuit structure diagram of the disclosed threshold voltage generation circuit of the embodiment of the present invention;
Fig. 6 is the electrical block diagram of disclosed another input signal strength indicating device of the embodiment of the present invention;
Fig. 7 is the circuit structure diagram of the disclosed programmable current mirror of the embodiment of the present invention;
Fig. 8 is the flow chart of the disclosed input signal strength indicating means of the embodiment of the present invention;
Fig. 9 is the schematic diagram of the disclosed self calibration flow process of the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
Fig. 1 is the electrical block diagram of the disclosed input signal strength indicating device of the embodiment of the present invention, shown in Figure 1, and described input signal strength indicating device can comprise:
Analog signal conversion, for being converted to input signal corresponding analog current signal I
rSSI; Described analog current signal I
rSSIbe negative linear correlation with the range value of described input signal;
In a schematic example, the concrete structure of described analog signal conversion can be referring to Fig. 2, Fig. 2 is the circuit structure diagram of the disclosed analog signal conversion of the embodiment of the present invention, as shown in Figure 2, described analog signal conversion can comprise N amplitude limiter and N+1 rectifier, and in Fig. 2, take 4 amplitude limiters and 5 rectifiers is example.Wherein, described amplitude limiter is for carrying out amplitude amplification by input signal; Described rectifier is for input signal is carried out to amplitude amplification, and the DC signal of each rectifier output gathers generation analog current signal I
rSSI.Wherein said N is positive integer.
Low-pass filter circuit, for by described analog current signal I
rSSIcarry out low-pass filtering treatment, and produce analog voltage signal V
rSSI;
The parameter of described low-pass filter circuit is controlled by the first output valve of conversion control circuit.One end of described low-pass filter circuit is connected with the output of described analog signal conversion, and one end ground connection, to generate and described analog current signal I
rSSIcorresponding analog voltage signal V
rSSI.
In a schematic example, the concrete structure of described low-pass filter circuit can be referring to Fig. 3, Fig. 3 is the circuit structure diagram of the disclosed low-pass filter circuit of the embodiment of the present invention, and as shown in Figure 3, described low pass filter can comprise a capacitor C and a programmable resistance R1 who is arranged in parallel.Due to one end ground connection of described low pass filter, therefore can, by changing the resistance of described programmable resistance R1, change described analog voltage signal V
rSSInumerical value.
Voltage comparator circuit, for by described analog voltage signal V
rSSIthe threshold voltage producing with threshold voltage generation circuit compares, and exports comparative result;
The concrete structure of described voltage comparator circuit can be referring to Fig. 4, Fig. 4 is the circuit structure diagram of the disclosed voltage comparator circuit of the embodiment of the present invention, as shown in Figure 4, described voltage comparator circuit can comprise the first comparison circuit 401 and the second comparison circuit 402, and described the first comparison circuit 401 is for more described analog voltage signal V
rSSIand the high value of threshold voltage Vh, described the second comparison circuit 402 is for more described analog voltage signal V
rSSIand threshold voltage low value Vl.The comparative result of described the first comparison circuit 401 and described the second comparison circuit 402 all exports conversion control circuit to.
Threshold voltage generation circuit, for generation of threshold voltage high value Vh and threshold voltage low value Vl;
The high value Vh of described threshold voltage and described threshold voltage low value Vl are controlled by the second output valve of described conversion control circuit.
The concrete structure of described threshold voltage generation circuit can be referring to Fig. 5, Fig. 5 is the circuit structure diagram of the disclosed threshold voltage generation circuit of the embodiment of the present invention, as shown in Figure 5, described threshold voltage generation circuit can comprise: two divider resistance R2 that programmable current source and series connection arrange and R3; Described programmable current source is controlled by the second output valve of described conversion control circuit.
A bit concrete, the second output valve of described conversion control circuit can directly be controlled the output current size of programmable current source, and two divider resistance series connection arrange, and two consitutional two ends of divider resistance connect respectively described programmable circuit source and ground, because the resistance of two divider resistances is determined, therefore, when the output current of described programmable current source is different, the voltage that two divider resistances are got is just different, the voltage that two divider resistances can be got and as the high value Vh of threshold voltage, the voltage that divider resistance is closely got is as threshold voltage low value Vl.It should be noted that, the high value Vh of described threshold voltage and described threshold voltage low value Vl are not one group of fixing numerical value, the high value Vh of threshold voltage and described threshold voltage low value Vl can change along with the change of described programmable current source output current size, and the second output valve that the size of described programmable current source output current is exported by described conversion control circuit is directly controlled.
Conversion control circuit, for exporting the first output valve or the second output valve according to the voltage ratio of described voltage comparator circuit compared with output control, and the output digital index signal corresponding with input signal amplitude.
Described input signal strength indicating device can have different mode of operations, for example self calibration pattern and the slight pattern of measurement input signal.Described conversion control circuit is under different mode of operations, and the comparative result that can produce according to described voltage comparator circuit comes the resistance value of low-pass filter circuit described in Indirect method or the threshold voltage that described threshold voltage generation circuit produces.
Fig. 6 is the electrical block diagram of disclosed another input signal strength indicating device of the embodiment of the present invention, the concrete circuit structure of the each several part of input signal strength indicating device has been shown in Fig. 6, can have understood in conjunction with Fig. 6 each several part circuit structure and the annexation thereof of above-mentioned input signal indicating device.
In the present embodiment, described input signal strength indicating device can carry out quantification treatment by the amplitude of input signal, and the output binary digital signal corresponding with input signal strength, and do not need special-purpose analog to digital converter to carry out analog signal to the conversion of digital signal, thereby do not need to measure in advance the relation between input signal amplitude and output voltage yet, not only reduce cost and the structure complexity of input signal indicating device, and simplified the whole handling process of input signal strength indicating device.
In other embodiment, described input signal strength indicating device is except disclosed each circuit structure of above-described embodiment, can also comprise the clock circuit being connected with described conversion control circuit, be used to described conversion control circuit that clock signal is provided, so that the regular work under the driving of clock circuit of described conversion control circuit.
Further, in other embodiment, described received signal strength indicator device can also comprise that one end is connected with the output of described analog signal conversion, the programmable current mirror that one end is connected with described conversion control circuit, described programmable current mirror is controlled by the 3rd output valve of described conversion control circuit.Concrete can be by change D(3:0) value change the value of analog current signal.The structural representation of described programmable current mirror can be referring to Fig. 7, and Fig. 7 is the circuit structure diagram of the disclosed programmable current mirror of the embodiment of the present invention.Wherein, the D0-D3 of Fig. 7 the first half is switching circuit, and the latter half is current mirroring circuit structure; I
rSSIfor analog current signal, I
rSSI-1the 3rd output valve for conversion control circuit output.
Fig. 8 is the flow chart of the disclosed input signal strength indicating means of the embodiment of the present invention, described input signal strength indicating means is applied in the disclosed input signal strength indicating device of above-described embodiment, and described input signal strength indicating device comprises analog signal conversion, low-pass filter circuit, voltage comparator circuit, threshold voltage generation circuit and conversion control circuit.Shown in Figure 8, described input signal strength indicating means can comprise:
Step 801: when described input signal amplitude is zero, conversion control circuit is set to maximum by the second output valve;
When described input signal strength indicating device is started working, the input range of input signal is zero, due to analog current signal I
rSSIbe negative linear correlation with the range value of institute input signal, therefore, analog current signal I now
rSSIwith analog voltage signal V
rSSIby maximum.Now need first the second output valve to be set to maximum, then carry out self calibration flow process.And the second output valve is set to maximum, the maximum threshold voltage that the high value Vh of threshold voltage now producing should can produce for described threshold voltage generation circuit.
Step 802: conversion control circuit is carried out self calibration flow process;
In a schematic example, the concrete steps of described self calibration flow process can be referring to Fig. 9, and Fig. 9 is the schematic diagram of the disclosed self calibration flow process of the embodiment of the present invention, as shown in Figure 9, can comprise:
Step 901: judge described analog voltage signal V
rSSIwhether be greater than the high value Vh of threshold voltage, if so, enter step 902, if not, enter step 905;
Step 902: conversion control circuit reduces the first output valve, the resistance value that control reduces low-pass filter circuit is to reduce described analog voltage signal V
rSSInumerical value; Enter step 905;
Step 903: judge described analog voltage signal V
rSSIwhether be less than threshold voltage low value Vl, if so, enter step 904, if not, enter step 905;
Step 904: conversion control circuit increases described the first output valve, controls the resistance value of the described low-pass filter circuit of increase to increase described analog voltage signal V
rSSInumerical value; Enter step 905;
Step 905: judgement analog voltage signal V
rSSInumerical value whether be positioned at the high value Vh of described threshold voltage and the definite voltage range of threshold voltage low value Vl, if so, enter step 906, if not, enter step 901 or step 903;
Step 906: finish.
Can find out in sum, described self calibration flow process is exactly in order to ensure described analog voltage signal V
rSSImaximum between described threshold voltage high value Vh and described threshold voltage low value Vl, can guarantee like this validity that input signal strength is measured, avoided the impact on measurement result of process deviation and temperature.
In the situation that described input signal strength indicating device comprises programmable current mirror, can also change analog current signal I by described programmable current mirror
rSSIthereby, carry out self calibration.In this case, the resistance value in low pass filter can not change, and self calibration flow process comprises: at analog voltage signal V
rSSIbe greater than in the situation of the high value Vh of threshold voltage, described conversion control circuit reduces the 3rd output valve, controls and reduces analog current signal I
rSSIto reduce described analog voltage signal V
rSSInumerical value; At described analog voltage signal V
rSSIbe less than in the situation of threshold voltage low value Vl, described conversion control circuit increases described the 3rd output valve, controls and increases analog current signal I
rSSIto increase described analog voltage signal V
rSSInumerical value; Repeat described self calibration flow process, until described analog voltage signal V
rSSInumerical value be positioned at the high value Vh of described threshold voltage and the definite voltage range of threshold voltage low value Vl.
After step 802, enter step 803.
Step 803: carry out input signal strength measurement procedure;
Wherein, described signal strength measurement flow process can comprise: described conversion control circuit is monitored analog voltage signal V by voltage comparator circuit
rSSI, as described analog voltage signal V
rSSIwhile being less than threshold voltage low value Vl, described conversion control circuit reduces the second output valve, and the electric current that control reduces described programmable current source is to reduce threshold voltage; As described analog voltage signal V
rSSIwhile being greater than the high value Vh of threshold voltage, described conversion control circuit increases described the second output valve, controls the electric current of the described programmable current source of increase to increase threshold voltage; Until described analog voltage signal V
rSSInumerical value be positioned at the high value Vh of described threshold voltage and the definite voltage range of threshold voltage low value Vl.
The detailed process of described input signal strength measurement procedure is similar with the concrete implementation of above-mentioned self calibration flow process, is the output valve difference that described conversion control circuit is controlled.
1) conversion control circuit carrys out the output current of regulating and controlling programmable current source by the second output valve, the variation of the output current of described programmable current source can be linear stepping, and described conversion control circuit is just controlled described the second output valve at every turn and added 1 or subtract 1.Certainly, conversion control circuit comes the output current of regulating and controlling programmable current source to realize by other algorithm by the second output valve, for example, adopt binary weights algorithm to realize, and the step that adopts binary weights algorithm to realize can be as follows:
By the second output valve D<sub TranNum="170">cI</sub>n-1 bit be made as 1, other positions are 0, i.e. D<sub TranNum="171">cI</sub>=2<sup TranNum="172">n-1</sup>, adopt voltage comparator circuit to judge, if V<sub TranNum="173">rSSI</sub><V<sub TranNum="174">tL</sub>, N-1 bit is made as 0; When V being detected<sub TranNum="175">rSSI</sub>>V<sub TranNum="176">tH</sub>, N-1 bit is made as 1;
By D<sub TranNum="178">cI</sub>n-2 bit be made as 1, i.e. D<sub TranNum="179">cI</sub>=D<sub TranNum="180">cI</sub>+ 2<sup TranNum="181">n-2</sup>, adopt voltage comparator circuit to judge, if V<sub TranNum="182">rSSI</sub><V<sub TranNum="183">tL</sub>, N-2 bit is made as 0; When V being detected<sub TranNum="184">rSSI</sub>>V<sub TranNum="185">tH</sub>, N-2 bit is made as 1.
According to above step, determine successively D
cIthe value of all the other bits, when the value of the 0th bit is determined, measures and finishes, by D
outbe updated to 2
n– 1 – D
cI.
Step 804: export the digital index signal corresponding with input signal amplitude.
Digital index signal and the input signal amplitude of described conversion control circuit output are one to one, the high value Vh of input signal amplitude and threshold voltage and the determined voltage range of threshold voltage low value Vl are one to one in other words, when input signal amplitude changes, will inevitably experience the input signal strength measurement procedure as described in step 803.
Comprehensive above-mentioned each step is known, when input signal amplitude is 0, and described analog current signal I
rSSImaximum, and described analog voltage signal V
rSSImaximum in range, the second output valve of described conversion control circuit will be set to maximum 2
n-1, and the digital index signal of described conversion control circuit output is 0 this moment; When input signal amplitude meets or exceeds on the range of described input signal strength indicating device in limited time, the amplitude limiter in described analog signal conversion is all saturated, analog current signal I
rSSIbe 0, and analog voltage signal V
rSSIminimum value in range, now the second output valve of described conversion control circuit is minimum value 0, and the digital signal of change-over circuit control output is maximum 2
n-1.In the time of in the measuring range of input signal amplitude in described input signal strength indicating device, the digital index signal of conversion control circuit output has and only has unique value corresponding with it.
The error of the intensity measurements of input signal is directly proportional to the amplitude range of input signal, is inversely proportional to the progression of described input signal strength indicating device.The number of the rectifier that wherein progression of input signal strength indicating device can comprise according to it determines, as comprises 5 rectifiers, and described input signal strength indicating device is just the input signal strength indicating device of 5 grades.In the situation that input signal amplitude scope is identical, the progression of input signal strength indicating device is more, and the intensity measurements error of input signal is less, so the progression of input signal strength indicating device has also determined quantization digit, i.e. N recited above indirectly.
In the present embodiment, described input signal strength indicating means can carry out quantification treatment by the amplitude of input signal, and the output binary digital signal corresponding with input signal strength, and do not need special-purpose analog to digital converter to carry out analog signal to the conversion of digital signal, thereby do not need to measure in advance the relation between input signal amplitude and output voltage yet, not only reduce cost and the structure complexity of input signal indicating device, and simplified the whole handling process of input signal strength indicating device.
In other embodiment, before the step of the output digital index signal corresponding with input signal amplitude, can also comprise that conversion control circuit detects analog voltage signal V in M clock cycle
rSSIsteps in threshold voltage high value Vh and the definite voltage range of threshold voltage low value Vl all, if so, enters the step of the output digital index signal corresponding with input signal amplitude.Wherein, described M is positive integer.If a continuous N clock all detects analog voltage signal V
rSSIall, in high threshold voltage and the definite voltage range of threshold voltage low value Vl, can think that the conversion work that input signal strength is measured has completed, and just can export digital index signal.
In this specification, each embodiment adopts the mode of going forward one by one to describe, and each embodiment stresses is the difference with other embodiment, between each embodiment identical similar part mutually referring to.
Also it should be noted that, in this article, relational terms such as the first and second grades is only used for an entity or operation to separate with another entity or operating space, and not necessarily requires or imply and between these entities or operation, have the relation of any this reality or sequentially.And, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thereby the process, method, article or the equipment that make to comprise a series of key elements not only comprise those key elements, but also comprise other key elements of clearly not listing, or be also included as the intrinsic key element of this process, method, article or equipment.The in the situation that of more restrictions not, the key element being limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment that comprises described key element and also have other identical element.
Above-mentioned explanation to the disclosed embodiments, makes professional and technical personnel in the field can realize or use the present invention.To the multiple modification of these embodiment, will be apparent for those skilled in the art, General Principle as defined herein can, in the situation that not departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (12)
1. an input signal strength indicating device, is characterized in that, comprising:
Analog signal conversion, for being converted to input signal corresponding analog current signal; The range value of described analog current signal and described input signal is negative linear correlation;
Low-pass filter circuit, for described analog current signal is carried out to low-pass filtering treatment, and produces analog voltage signal; The parameter of described low-pass filter circuit is controlled by the first output valve of conversion control circuit;
Voltage comparator circuit, for the threshold voltage of described analog voltage signal and threshold voltage generation circuit generation is compared, and exports comparative result;
Threshold voltage generation circuit, for generation of the high value of threshold voltage and threshold voltage low value; The high value of described threshold voltage and the definite voltage range of described threshold voltage low value are controlled by the second output valve of described conversion control circuit;
Conversion control circuit, for exporting the first output valve or the second output valve according to the voltage ratio of described voltage comparator circuit compared with output control, and the output digital index signal corresponding with input signal amplitude.
2. input signal strength indicating device according to claim 1, is characterized in that, described analog signal conversion comprises N amplitude limiter and N+1 rectifier; Wherein, described amplitude limiter is for input signal is carried out to amplitude amplification, and described rectifier is for ac signal is converted to DC signal, and the DC signal of each rectifier output gathers generation analog current signal; Described N is positive integer.
3. received signal strength indicator device according to claim 1, is characterized in that, described low-pass filter circuit one end is connected with the output of described analog signal conversion, and one end ground connection comprises the electric capacity and the programmable resistance that are arranged in parallel.
4. received signal strength indicator device according to claim 1, it is characterized in that, described voltage comparator circuit comprises the first comparison circuit and the second comparison circuit, described the first comparison circuit is for more described analog voltage signal and the high value of voltage threshold, and described the second comparison circuit is for more described analog voltage signal and voltage threshold low value.
5. received signal strength indicator device according to claim 1, is characterized in that, described threshold voltage generation circuit comprises two divider resistances that programmable current source and series connection arrange; Described programmable current source is controlled by the second output valve of described conversion control circuit.
6. reception signal indicator according to claim 1, is characterized in that, also comprises:
With the clock circuit that described conversion control circuit is connected, be used to described conversion control circuit that clock signal is provided.
7. received signal strength indicator device according to claim 1, is characterized in that, also comprises:
One end is connected with the output of described analog signal conversion, the programmable current mirror that one end is connected with described conversion control circuit, and described programmable current mirror is controlled by the 3rd output valve of described conversion control circuit.
8. an input signal strength indicating means, is applied to, in the input signal strength indicating device as described in claim 1-7 any one, it is characterized in that, comprising:
When described input signal amplitude is zero, conversion control circuit is set to maximum by the second output valve;
Conversion control circuit is carried out self calibration flow process;
Carry out input signal strength measurement procedure;
Export the digital index signal corresponding with input signal amplitude.
9. input signal strength indicating means according to claim 8, it is characterized in that, described self calibration flow process comprises: in the situation that analog voltage signal is greater than the high value of threshold voltage, described conversion control circuit reduces the first output valve, and the resistance value that control reduces low-pass filter circuit is to reduce the numerical value of described analog voltage signal; In the situation that described analog voltage signal is less than threshold voltage low value, described conversion control circuit increases described the first output valve, controls the resistance value of the described low-pass filter circuit of increase to increase the numerical value of described analog voltage signal;
Repeat described self calibration flow process, until the numerical value of described analog voltage signal is positioned at the high value of described threshold voltage and the definite voltage range of threshold voltage low value.
10. input signal strength indicating means according to claim 8, it is characterized in that, described self calibration flow process comprises: in the situation that analog voltage signal is greater than the high value of threshold voltage, described conversion control circuit reduces the 3rd output valve, controls and reduces analog current signal to reduce the numerical value of described analog voltage signal; In the situation that described analog voltage signal is less than threshold voltage low value, described conversion control circuit increases described the 3rd output valve, controls and increases analog current signal to increase the numerical value of described analog voltage signal;
Repeat described self calibration flow process, until the numerical value of described analog voltage signal is positioned at the high value of described threshold voltage and the definite voltage range of threshold voltage low value.
11. input signal strength indicating means according to claim 8, is characterized in that, described input signal strength measurement procedure comprises:
Described conversion control circuit is monitored analog voltage signal by voltage comparator circuit, when described analog voltage signal is less than threshold voltage low value, described conversion control circuit reduces the second output valve, and the electric current that control reduces described programmable current source is to reduce threshold voltage; When described analog voltage signal is greater than the high value of threshold voltage, described conversion control circuit increases described the second output valve, controls the electric current of the described programmable current source of increase to increase threshold voltage; Until the numerical value of described analog voltage signal is positioned at the high value of described threshold voltage and the definite voltage range of threshold voltage low value.
12. input signal strength indicating means according to claim 8, is characterized in that, before the output digital index signal corresponding with input signal amplitude, also comprise:
Conversion control circuit detects analog voltage signal in M clock cycle whether all in the high value of threshold voltage and the definite voltage range of threshold voltage low value, if so, enters the step of exporting the digital index signal corresponding with input signal amplitude; Described M is positive integer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310446095.5A CN103516366B (en) | 2013-09-26 | 2013-09-26 | Input signal intensity indicator and indicating method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310446095.5A CN103516366B (en) | 2013-09-26 | 2013-09-26 | Input signal intensity indicator and indicating method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103516366A true CN103516366A (en) | 2014-01-15 |
| CN103516366B CN103516366B (en) | 2017-01-18 |
Family
ID=49898502
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310446095.5A Active CN103516366B (en) | 2013-09-26 | 2013-09-26 | Input signal intensity indicator and indicating method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103516366B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106941382A (en) * | 2016-01-04 | 2017-07-11 | 中兴通讯股份有限公司 | The self calibration implementation method and device of a kind of radio frequency matrix switch |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1993026110A1 (en) * | 1992-06-10 | 1993-12-23 | At & T Wireless Communications Products Ltd. | Dc tracking circuit for ginomy data slicer |
| CN101354412A (en) * | 2008-08-28 | 2009-01-28 | 深圳华为通信技术有限公司 | Apparatus for testing electromagnetic radiation strength |
-
2013
- 2013-09-26 CN CN201310446095.5A patent/CN103516366B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1993026110A1 (en) * | 1992-06-10 | 1993-12-23 | At & T Wireless Communications Products Ltd. | Dc tracking circuit for ginomy data slicer |
| CN101354412A (en) * | 2008-08-28 | 2009-01-28 | 深圳华为通信技术有限公司 | Apparatus for testing electromagnetic radiation strength |
Non-Patent Citations (2)
| Title |
|---|
| YEN JU THE等: "A 40-MHz CMOS RSSI with Data Slicer", 《INTERNATIONAL SYMPOSIUM ON INTEGRATED CIRCUITS》, 28 September 2007 (2007-09-28) * |
| 李丹等: "应用于OFDM-UWB接收机的CMOS信号强度指示器", 《复旦学报(自然科学版)》, vol. 51, no. 1, 15 February 2012 (2012-02-15), pages 57 - 60 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106941382A (en) * | 2016-01-04 | 2017-07-11 | 中兴通讯股份有限公司 | The self calibration implementation method and device of a kind of radio frequency matrix switch |
| WO2017118279A1 (en) * | 2016-01-04 | 2017-07-13 | 中兴通讯股份有限公司 | Self-calibration implementation method and device for radio frequency matrix switch |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103516366B (en) | 2017-01-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104583784B (en) | The system and method for Input Power ＆ Current measurement | |
| CN105628266A (en) | Temperature compensation system and method of pressure sensor | |
| CN102684696B (en) | The testing apparatus of A/D converter and method of testing | |
| CN109510616A (en) | Sensor interface control circuit based on RC oscillating circuit | |
| CN104483626A (en) | Device and system for testing characteristics of transformer on-load tap-changer | |
| CN103969614A (en) | Calibration method for digital multimeter | |
| CN104880020A (en) | Variable-frequency refrigerator 0.1-degree temperature acquisition processing method | |
| CN105182069A (en) | High resolution group quantization phase processing method under pilot frequency architecture | |
| CN110554328B (en) | HHT-based storage battery internal resistance measurement method and system | |
| CN105548710A (en) | Enhanced automatic balance bridge and method for realizing impedance measurement | |
| CN103516366A (en) | Input signal intensity indicator and indicating method | |
| CN109100928B (en) | High-precision pulse time interval measuring method and circuit | |
| CN110967660A (en) | Method and system for detecting current transformer | |
| RU2014153145A (en) | CHECK THE CURRENT CONTROL OF THE PROCESS | |
| CN102809684A (en) | Power detection method and circuit for primary side circuit of power supply unit | |
| CN106405477B (en) | Evaluation method and device for metering performance under dynamic load | |
| CN205643468U (en) | Electronic voltage transformer suitable for smart power grid power quality detection | |
| CN112230043A (en) | Method for separating alternating current from direct current by utilizing magnetic balance principle | |
| CN107656213A (en) | The intelligent test method and system of a kind of battery | |
| CN103809059B (en) | A kind of signal detecting method and device | |
| CN102721871A (en) | Method for measuring phase difference of voltage and total current of zinc oxide arrester | |
| CN105958510B (en) | SOC chip for power grid monitoring and control equipment | |
| CN107015095B (en) | Method and system for judging state of secondary circuit of current transformer | |
| US20150030114A1 (en) | Frequency locking system | |
| CN202631664U (en) | Automatic comprehensive tester for testing parameters of potentiometer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 215347 7th floor, IIR complex, 1699 Weicheng South Road, Kunshan City, Suzhou City, Jiangsu Province Patentee after: Kunshan Microelectronics Technology Research Institute Address before: 215347 905, complex building, No. 1699, Weicheng South Road, Kunshan City, Suzhou City, Jiangsu Province Patentee before: KUNSHAN BRANCH, INSTITUTE OF MICROELECTRONICS OF CHINESE ACADEMY OF SCIENCES |