CN203289414U - Sending part radio-frequency receiving front-end circuit - Google Patents
Sending part radio-frequency receiving front-end circuit Download PDFInfo
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- CN203289414U CN203289414U CN2013203695107U CN201320369510U CN203289414U CN 203289414 U CN203289414 U CN 203289414U CN 2013203695107 U CN2013203695107 U CN 2013203695107U CN 201320369510 U CN201320369510 U CN 201320369510U CN 203289414 U CN203289414 U CN 203289414U
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- max1472
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- pin
- frequency receiving
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Abstract
The utility model discloses a sending part radio-frequency receiving front-end circuit which comprises a chip MAX1472. A crystal oscillator is connected between a pin XTAL1 of the chip MAX1472 and a pin XTAL2 of the chip MAX1472. A pin GND of the chip MAX1472 and a pin PAGND of the chip MAX1472 are both grounded. A pin VDD of the chi MAX1472 is connected to a VDD and connected with a capacitor C4. The other terminal of the capacitor C4 is grounded. A pin PAOUT of the chip MAX1472 is connected with a peripheral circuit. The sending part radio-frequency receiving front-end circuit is advantageous in that the chip MAX1472 is employed, that the profundity of the structural adjustment based on the crystal oscillator is wider, that frequency stabilization is faster, and that the circuit is less dependent on temperature, so as to make the performance of the circuit more stable.
Description
Technical field
The utility model relates to integrated circuit, relates in particular a kind of transmitting portion radio frequency receiving front-end circuit.
Background technology
Wireless remote control is as the radio remote control switch of wireless industrial electric control, security warning system, household electrical appliance controlled in wireless, toy controlled in wireless, vehicle, automobile wireless theft-proof remote control etc., and because it is easy to operate, its range of application is very extensive.Existing household electrical appliance and private car remote control transmitter are portable hand-held remote control unit mostly, its wireless signal when sending, the stability of its frequency and most important to the overall performance that signal transmits and receives to the dependence of temperature.
The utility model content
The utility model provides a kind of transmitting portion radio frequency receiving front-end circuit, adopts chip MAX1472, and its degree of depth of structural adjustment based on crystal oscillator is wider, and frequency stabilization is faster, and lower to the dependence of temperature, makes the stable performance of this circuit.
For solving above-mentioned technical problem, the utility model by the following technical solutions:
The transmitting portion radio frequency receiving front-end circuit, it comprises chip MAX1472, be connected with crystal oscillator between the pin XTAL2 of described chip MAX1472 and pin XTAL2, the pin GND of described chip MAX1472 and the equal ground connection of pin PAGND, the pin VDD of described chip MAX1472 is connected on VDD, and be connected with capacitor C 4 on pin VDD, the other end ground connection of described capacitor C 4, be connected with peripheral circuit on the pin PAOUT of described chip MAX1472.
Further technical scheme is:
described peripheral circuit comprises capacitor C 1, capacitor C 2, capacitor C 3, capacitor C 5, capacitor C 6, capacitor C 7, inductance L 1, inductance L 2 and antenna, described capacitor C 5, inductance L 2, capacitor C 7 is connected successively, and the other end of capacitor C 7 is connected on the pin PAOUT of chip MAX1472, the other end ground connection of capacitor C 5, the end that described capacitor C 5 is connected with inductance L 2 is connected with antenna, be connected with capacitor C 6 on described inductance L 2 and a end that capacitor C 7 is connected, the other end ground connection of described capacitor C 6, one end of described inductance L 1 is connected on the pin PAOUT of chip MAX1472, other end while and capacitor C 1, capacitor C 2, capacitor C 3 is connected and is connected to simultaneously on VDD, described capacitor C 1, the other end ground connection of capacitor C 2 and capacitor C 3.
Described VDD is 3.0V.
Described capacitor C 1 and capacitor C 4 are 100nF.
Described capacitor C 2 is 220pF.
Compared with prior art, the beneficial effects of the utility model are: the utility model adopts chip MAX1472, chip MAX1472 is a phase-locked loop VHF/UHF transmitter take crystal oscillator as benchmark, its frequency stabilization is faster, and the dependence to temperature is lower, further strengthens this circuit stability.
Description of drawings
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Fig. 1 is circuit theory diagrams of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further described.Execution mode of the present utility model includes but not limited to the following example.
[embodiment]
Transmitting portion radio frequency receiving front-end circuit as shown in Figure 1, it comprises chip MAX1472, be connected with crystal oscillator between the pin XTAL2 of described chip MAX1472 and pin XTAL2, the pin GND of described chip MAX1472 and the equal ground connection of pin PAGND, the pin VDD of described chip MAX1472 is connected on VDD, and be connected with capacitor C 4 on pin VDD, the other end ground connection of described capacitor C 4, be connected with peripheral circuit on the pin PAOUT of described chip MAX1472.
described peripheral circuit comprises capacitor C 1, capacitor C 2, capacitor C 3, capacitor C 5, capacitor C 6, capacitor C 7, inductance L 1, inductance L 2 and antenna, described capacitor C 5, inductance L 2, capacitor C 7 is connected successively, and the other end of capacitor C 7 is connected on the pin PAOUT of chip MAX1472, the other end ground connection of capacitor C 5, the end that described capacitor C 5 is connected with inductance L 2 is connected with antenna, be connected with capacitor C 6 on described inductance L 2 and a end that capacitor C 7 is connected, the other end ground connection of described capacitor C 6, one end of described inductance L 1 is connected on the pin PAOUT of chip MAX1472, other end while and capacitor C 1, capacitor C 2, capacitor C 3 is connected and is connected to simultaneously on VDD, described capacitor C 1, the other end ground connection of capacitor C 2 and capacitor C 3.
Described VDD is 3.0V.
Described capacitor C 1 and capacitor C 4 are 100nF.
Described capacitor C 2 is 220pF.
The utility model adopts chip MAX1472, and it is a phase-locked loop VHF/UHF transmitter take crystal oscillator as benchmark, is used for 300MHz to 450MHz frequency range and sends the OOK/ASK data.The frequency temperature of chip MAX1472 is faster and dependence temperature is lower, has avoided problem common in the transmitter, further to strengthen the temperature performance of this circuit.
Peripheral circuit is used for preventing outside interference, further strengthens the antijamming capability of whole circuit.
Be as mentioned above embodiment of the present utility model.The utility model is not limited to above-mentioned execution mode, and anyone should learn the structural change of making under enlightenment of the present utility model, every with the utlity model has identical or close technical scheme, within all falling into protection range of the present utility model.
Claims (5)
1. transmitting portion radio frequency receiving front-end circuit, it is characterized in that: it comprises chip MAX1472, be connected with crystal oscillator between the pin XTAL2 of described chip MAX1472 and pin XTAL2, the pin GND of described chip MAX1472 and the equal ground connection of pin PAGND, the pin VDD of described chip MAX1472 is connected on VDD, and be connected with capacitor C 4 on pin VDD, the other end ground connection of described capacitor C 4, be connected with peripheral circuit on the pin PAOUT of described chip MAX1472.
2. transmitting portion radio frequency receiving front-end circuit according to claim 1, it is characterized in that: described peripheral circuit comprises capacitor C 1, capacitor C 2, capacitor C 3, capacitor C 5, capacitor C 6, capacitor C 7, inductance L 1, inductance L 2 and antenna, described capacitor C 5, inductance L 2, capacitor C 7 is connected successively, and the other end of capacitor C 7 is connected on the pin PAOUT of chip MAX1472, the other end ground connection of capacitor C 5, the end that described capacitor C 5 is connected with inductance L 2 is connected with antenna, be connected with capacitor C 6 on described inductance L 2 and a end that capacitor C 7 is connected, the other end ground connection of described capacitor C 6, one end of described inductance L 1 is connected on the pin PAOUT of chip MAX1472, other end while and capacitor C 1, capacitor C 2, capacitor C 3 is connected and is connected to simultaneously on VDD, described capacitor C 1, the other end ground connection of capacitor C 2 and capacitor C 3.
3. transmitting portion radio frequency receiving front-end circuit according to claim 2, it is characterized in that: described VDD is 3.0V.
4. transmitting portion radio frequency receiving front-end circuit according to claim 2, it is characterized in that: described capacitor C 1 and capacitor C 4 are 100nF.
5. transmitting portion radio frequency receiving front-end circuit according to claim 4 is characterized in that: described capacitor C 2 is 220pF.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203695107U CN203289414U (en) | 2013-06-26 | 2013-06-26 | Sending part radio-frequency receiving front-end circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203695107U CN203289414U (en) | 2013-06-26 | 2013-06-26 | Sending part radio-frequency receiving front-end circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203289414U true CN203289414U (en) | 2013-11-13 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013203695107U Expired - Fee Related CN203289414U (en) | 2013-06-26 | 2013-06-26 | Sending part radio-frequency receiving front-end circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203289414U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103346809A (en) * | 2013-06-26 | 2013-10-09 | 成都网动光电子技术股份有限公司 | Receiving front-end circuit for transmitting part of radio frequency |
-
2013
- 2013-06-26 CN CN2013203695107U patent/CN203289414U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103346809A (en) * | 2013-06-26 | 2013-10-09 | 成都网动光电子技术股份有限公司 | Receiving front-end circuit for transmitting part of radio frequency |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131113 Termination date: 20160626 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |