CN203326964U - Carrier signal attenuation circuit - Google Patents
Carrier signal attenuation circuit Download PDFInfo
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- CN203326964U CN203326964U CN2013202023776U CN201320202377U CN203326964U CN 203326964 U CN203326964 U CN 203326964U CN 2013202023776 U CN2013202023776 U CN 2013202023776U CN 201320202377 U CN201320202377 U CN 201320202377U CN 203326964 U CN203326964 U CN 203326964U
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- attenuator circuit
- inductance
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- electric capacity
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Abstract
The utility model relates to a carrier signal attenuation circuit which comprises a signal input end, a first attenuation circuit, at least one second attenuation circuit and at least one grounding end, wherein the first attenuation circuit attenuates input signals, and the second attenuation circuit attenuates input signals which are attenuated by the first attenuation circuit. Whether the second attenuation circuit attenuates the signals or not is controlled by a switching element in the second attenuation circuit, so that the input signals can be attenuated for once or multiple times, and the versatility of the carrier signal attenuation circuit is improved.
Description
Technical field
The utility model relates to communication technical field, relates in particular to a kind of carrier signal attenuator circuit.
Background technology
Along with the development of modern science and technology, the frequency of occurrences of radio communication in people's life is more and more higher, and signal attenuation is the problem often run in communication process, and the engineer need to go the impact of detection signal decay on signal by the carrier signal attenuator circuit usually.
In prior art, the general filter that adopts carries out the filtering processing to input signal, need to do how many attenuations to input signal, change the parameter of electric capacity or inductance, or the quantity of increase and minimizing filter, to reach the purpose of conditioning signal attenuation, but change the parameter of electric capacity in circuit or inductance, or increase, reduce filter and bother very much.
The utility model content
Main purpose of the present utility model is to provide a kind of carrier signal attenuator circuit, is intended to improve versatility and the flexibility of carrier signal attenuator circuit.
The utility model proposes a kind of carrier signal attenuator circuit, it is characterized in that, comprise signal input part, the first attenuator circuit for input signal is decayed, the second attenuator circuit and at least one earth terminal that at least one is decayed again to the input signal after decaying; The input of described the first attenuator circuit is connected with described signal input part, the input of described the second attenuator circuit is connected with the output of the first attenuator circuit, be provided with at least one switch element in described the second attenuator circuit, described switch element is controlled the unlatching of the second attenuator circuit or is closed.
Preferably, described switch element comprises the first tip side, the second tip side and the control end be connected with the first tip side or the second tip side, the first tip side is connected with the output of the first attenuator circuit, the second tip side is connected with the first attenuation units of the second attenuator circuit, and control end is connected with the second attenuation units and the earth terminal of the second attenuator circuit.
Preferably, described the first attenuator circuit comprises the first inductance, the first electric capacity, the second inductance and the second electric capacity, wherein:
Described the first inductance one end is connected with described signal input part, and the other end is divided into two-way, and a road is connected with described the second electric capacity one end, and another road is connected with described the second attenuator circuit, and the other end of described the second electric capacity is through the second inductance ground connection; Described the first electric capacity and described the first inductance in parallel.
Preferably, described the second attenuation units comprises the 3rd inductance and the 3rd electric capacity, wherein: an end of described the 3rd inductance is divided into two-way, one tunnel is connected with the first contact of described switch element, another road is connected with described the first attenuator circuit, the other end of described the 3rd inductance is connected with the control end of described switch element, described the 3rd electric capacity and described the 3rd inductance in parallel.
Preferably, described the first attenuation units comprises the 4th electric capacity and the 4th inductance, and wherein: described the 4th electric capacity one end is connected with the second contact of described switch element, and the other end is through described the 4th inductance ground connection.
Preferably, described the first attenuator circuit also comprises the first resistance, described the first resistance and described the second inductance in parallel.
Preferably, described the second attenuator circuit also comprises the second resistance, described the second resistance and described the 4th Capacitance parallel connection.
Preferably, also comprise the 3rd resistance and the 4th resistance, described the 3rd resistance one end is connected with described signal input part, and the other end is connected with the first attenuator circuit; Described the 4th resistance one end is connected with the control end of described switch element, other end ground connection.
The carrier signal attenuator circuit the utility model proposes, this circuit comprises signal input part, the first attenuator circuit for input signal is decayed, the second attenuator circuit and at least one earth terminal that at least one is decayed again to the input signal after described the first attenuator circuit decay, control that the second attenuator circuit is decayed to signal or unattenuated by the switch element in the second attenuator circuit, optionally input signal is carried out to the one or many decay, improved the versatility of this circuit.
The accompanying drawing explanation
The connection diagram that Fig. 1 is the utility model carrier signal attenuator circuit preferred embodiment.
The realization of the utility model purpose, functional characteristics and advantage, in connection with embodiment, are described further with reference to accompanying drawing.
Embodiment
Below in conjunction with drawings and the specific embodiments, with regard to the technical solution of the utility model, be described further.Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.
With reference to Fig. 1, the connection diagram that Fig. 1 is the utility model carrier signal attenuator circuit preferred embodiment.
The carrier signal attenuator circuit that the present embodiment proposes comprises signal input part Vin, the first attenuator circuit 10 for input signal is decayed, the second attenuator circuit 20 and at least one earth terminal that at least one is decayed again to the input signal after the first attenuator circuit decay; The input of the first attenuator circuit 10 is connected with signal input part Vin, the input of the second attenuator circuit 20 is connected with the output of the first attenuator circuit 10, be provided with at least one switch element K in the second attenuator circuit, switch element K controls the unlatching of the second attenuator circuit 20 or closes.
In the present embodiment, switch element K comprises the first tip side b, the second tip side c and the control end a be connected with the first tip side b or the second tip side c, the first tip side b is connected with the output of the first attenuator circuit 10, the second tip side c is connected with the first attenuation units 21 of the second attenuator circuit 20, and control end a is connected with the second attenuation units 22 and the earth terminal of the second attenuator circuit 20.Switch element can be single-pole double-throw switch (SPDT) in the present embodiment, also can be relay or other switch element.
The first attenuator circuit 10 comprises the first inductance L 1, the first capacitor C 1, the second inductance L 2 and the second capacitor C 2 in the present embodiment.
Wherein, the first inductance L 1 one ends are connected with signal input part Vin, and the other end is divided into two-way, and a road is connected with an end of the second capacitor C 2, and another road is connected with the second attenuator circuit 20, and the other end of the second capacitor C 2 is through the second inductance ground connection; The first capacitor C 1 is in parallel with the first inductance L 1.
Form a band stop filter after the first inductance L 1 and the first capacitor C 1 are in parallel, band stop filter weakens frequency signal centered by cut-off frequency, but tolerance frequency is lower than the what lower-cut-off frequency with higher than the passing through of the signal of upper cut-off frequency, and the computing formula of the cut-off frequency of band stop filter is:
.Form a trapper after the second capacitor C 2 and the second inductance L 2 series connection, trapper absorbs the signal of a certain centre frequency for bypass, and the computing formula of this centre frequency is:
.The centre frequency that the cut-off frequency of band stop filter and trapper bypass absorb all with the relating to parameters of inductance and electric capacity.
In the present embodiment, preferred version is that the first inductance L 1 is 330 μ H, the first capacitor C 1 is 33PF, the second inductance L 2 is 12 μ H, the second capacitor C 2 is 4.7 PF, but by computing formula, can calculate the input signal that input signal that these the first attenuator circuit 10 cut-off frequencies are 1.5MHZ and bypass sponge 21KHZ, through after the decay of this first attenuator circuit 10, this attenuated input signal 30dB.
In the present embodiment, the second attenuation units 22 comprises the 3rd inductance L 3 and the 3rd capacitor C 3.
Wherein, an end of the 3rd inductance L 3 is divided into two-way, and a road is connected with the first contact b of switch element K, and another road is connected with the first attenuator circuit 10, and the other end of the 3rd inductance L 3 is connected with the control end a of switch element K, and the 3rd capacitor C 3 is in parallel with the 3rd inductance L 3.
The first attenuation units 21 comprises the 4th inductance L 4 and the 4th capacitor C 4, and wherein: the 4th capacitor C 4 one ends are connected with the second contact c of switch element K, and the other end is through the 4th inductance L 4 ground connection.
In the present embodiment, preferred version is that the 3rd inductance L 3 is 330 μ H, the 3rd capacitor C 3 is 33PF, the 4th inductance L 4 is 12 μ H, the 4th capacitor C 4 is 4.7 PF, but by computing formula, can calculate the input signal that input signal that these the first attenuator circuit 10 cut-off frequencies are 1.5MHZ and bypass sponge 21KHZ, through after the decay of this second attenuator circuit 20, this attenuated input signal 30dB.
When the control end a of switch element K is connected with the first contact b, the 3rd inductance L 3, the 3rd capacitor C 3, the 4th inductance L 4 and the 4th capacitor C 4 are all by short circuit, so input signal is only decayed through the first attenuator circuit 10 after input, can be by attenuated input signal 30dB; When the control end a of switch element K is connected with the second contact c, input signal after the first attenuator circuit 10 and the second attenuator circuit 20 are decayed, decay 60dB.
A plurality of the second attenuator circuits 20 can be set in the carrier signal attenuator circuit, can control this attenuator circuit according to switch element K and input signal be carried out to the decay of 30 dB or 60dB or 90dB, much more flexible selectivity is, improved the versatility of carrier signal attenuator circuit.
The first attenuator circuit 10 also comprises the first resistance R 1 in the present embodiment, and this first resistance R 1 is in parallel with the second inductance L 2, and this first resistance R 1 is preferably 1M Ω.The second attenuator circuit 20 also comprises the second resistance R 2, and this second resistance R 2 is in parallel with the 4th capacitor C 4, and this second resistance R 2 is preferably 1M Ω.
In the present embodiment, this carrier signal attenuator circuit also comprises that the 3rd resistance R 3 and the 4th resistance R 4, the three resistance R 3 one ends are connected with signal input part Vin, and the other end is connected with the first attenuator circuit 10; The 4th resistance R 4 one ends are connected with the control end a of switch element K, other end ground connection.
The foregoing is only preferred embodiment of the present utility model; not thereby limit the scope of the claims of the present utility model; every equivalent structure transformation that utilizes the utility model specification and accompanying drawing content to do; or directly or indirectly be used in other relevant technical fields, all in like manner be included in scope of patent protection of the present utility model.
Claims (8)
1. a carrier signal attenuator circuit, it is characterized in that, comprise signal input part, the first attenuator circuit for input signal is decayed, the second attenuator circuit and at least one earth terminal that at least one is decayed again to the input signal after decaying; The input of described the first attenuator circuit is connected with described signal input part, the input of described the second attenuator circuit is connected with the output of the first attenuator circuit, be provided with at least one switch element in described the second attenuator circuit, described switch element is controlled the unlatching of the second attenuator circuit or is closed.
2. circuit according to claim 1, it is characterized in that, described switch element comprises the first tip side, the second tip side and the control end be connected with the first tip side or the second tip side, the first tip side is connected with the output of the first attenuator circuit, the second tip side is connected with the first attenuation units of the second attenuator circuit, and control end is connected with the second attenuation units and the earth terminal of the second attenuator circuit.
3. circuit according to claim 1, is characterized in that, described the first attenuator circuit comprises the first inductance, the first electric capacity, the second inductance and the second electric capacity, wherein:
Described the first inductance one end is connected with described signal input part, and the other end is divided into two-way, and a road is connected with described the second electric capacity one end, and another road is connected with described the second attenuator circuit, and the other end of described the second electric capacity is through the second inductance ground connection; Described the first electric capacity and described the first inductance in parallel.
4. follow according to circuit claimed in claim 3, it is characterized in that, described the second attenuation units comprises the 3rd inductance and the 3rd electric capacity, wherein: an end of described the 3rd inductance is divided into two-way, one tunnel is connected with the first contact of described switch element, another road is connected with described the first attenuator circuit, and the other end of described the 3rd inductance is connected with the control end of described switch element, described the 3rd electric capacity and described the 3rd inductance in parallel.
5. circuit according to claim 4, is characterized in that, described the first attenuation units comprises the 4th electric capacity and the 4th inductance, and wherein: described the 4th electric capacity one end is connected with the second contact of described switch element, and the other end is through described the 4th inductance ground connection.
6. according to the described circuit of any one in claim 3-5, it is characterized in that, described the first attenuator circuit also comprises the first resistance, described the first resistance and described the second inductance in parallel.
7. circuit according to claim 5, is characterized in that, described the second attenuator circuit also comprises the second resistance, described the second resistance and described the 4th Capacitance parallel connection.
8. circuit according to claim 7, is characterized in that, also comprises the 3rd resistance and the 4th resistance, and an end of described the 3rd resistance is connected with described signal input part, and the other end is connected with the first attenuator circuit; Described the 4th resistance one end is connected with the control end of described switch element, other end ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202023776U CN203326964U (en) | 2013-04-19 | 2013-04-19 | Carrier signal attenuation circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202023776U CN203326964U (en) | 2013-04-19 | 2013-04-19 | Carrier signal attenuation circuit |
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| Publication Number | Publication Date |
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| CN203326964U true CN203326964U (en) | 2013-12-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2013202023776U Expired - Lifetime CN203326964U (en) | 2013-04-19 | 2013-04-19 | Carrier signal attenuation circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111525903A (en) * | 2020-03-30 | 2020-08-11 | 北京邮电大学 | Broadband absorption type band-stop filter chip based on thin film IPD technology |
-
2013
- 2013-04-19 CN CN2013202023776U patent/CN203326964U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111525903A (en) * | 2020-03-30 | 2020-08-11 | 北京邮电大学 | Broadband absorption type band-stop filter chip based on thin film IPD technology |
| CN111525903B (en) * | 2020-03-30 | 2022-02-08 | 北京邮电大学 | Broadband absorption type band-stop filter chip based on thin film IPD technology |
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Legal Events
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190306 Address after: 518057 Guangdong Province Nanshan District Yuehai Street High-tech Industrial Park (South District) South Building 701, Lighting Center, South 12 Road, Science and Technology Patentee after: Shenzhen Zhongdian Yuncheng Technology Co.,Ltd. Address before: 518000 New Olin Building 210-211, Langshan Second Road, North District of Nanshan Science Park, Shenzhen City, Guangdong Province Patentee before: SHENZHEN ZHIYE TECHNOLOGY Co.,Ltd. |
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| TR01 | Transfer of patent right | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131204 |
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| CX01 | Expiry of patent term |