CN209283220U - A kind of silicon tuner wide band receiver - Google Patents
A kind of silicon tuner wide band receiver Download PDFInfo
- Publication number
- CN209283220U CN209283220U CN201920341969.3U CN201920341969U CN209283220U CN 209283220 U CN209283220 U CN 209283220U CN 201920341969 U CN201920341969 U CN 201920341969U CN 209283220 U CN209283220 U CN 209283220U
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- frequency
- silicon tuner
- silicon
- mcu
- signal
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- Superheterodyne Receivers (AREA)
Abstract
The utility model provides a kind of silicon tuner wide band receiver, including antenna, silicon tuner, intermediate frequency demodulation, audio frequency power amplifier, loudspeaker, MCU manipulation unit (including key, LCD display, frequency memory).Radio signal is input to silicon tuner by antenna, is controlled by MCU manipulation unit and is tuned to receive frequency, exported intermediate-freuqncy signal, then through intermediate frequency demodulation output audio signal, send to audio frequency power amplifier and push loudspeaker sounding.Each section circuit is made of complete IC scheme, and reception frequency need to be only adjusted by key can be realized 26 ~ 1023MHz continuous tuning and the collection of letters, switch without wave frequency section, and AM/FM is unified to be demodulated.Easy to operate, structure simplifies, and stability is good, is suitble to be made into portable device.Survey letter and reception suitable for radio signal in 1GHz.
Description
Technical field
The utility model relates to radio receiver field more particularly to wide band receivers.
Background technique
Existing wide band receiver is divided into several wave bands receiving in frequency range, the corresponding one group of circuit LC of each wave band
And VCO, it is selected wherein to receive for one group by user, to realize the reception of entire wide-band.And the demodulation of AM/FM signal
Also respectively there is a set of independent demodulator circuit, switch one by user to realize one of demodulation modes.Complete machine structure is many and diverse,
Manufacture difficulty is caused to increase, stability will receive influence, and user's operation is also complicated, and volume is larger, be unfavorable for being made into portable set
It is standby.
Summary of the invention
In view of the above-mentioned deficiencies, the utility model provides a kind of silicon tuner wide band receiver, receiver structure letter
Change, the reception of entire wide-band is completed using single group of tuning circuit, no wave band switching, AM/FM is unified to be demodulated, operation letter
Just, the key for receiving frequency is only adjusted.
To solve the above-mentioned problems, the utility model is achieved through the following technical solutions: a kind of silicon tuner wide-band
Receiver, including antenna, silicon tuner, intermediate frequency demodulation, audio frequency power amplifier, loudspeaker, MCU manipulates unit, it is characterized in that: radio
Signal is input to silicon tuner by antenna, control by MCU manipulation unit and is tuned to receive frequency, output intermediate-freuqncy signal, then passes through
Frequency demodulation output audio signal, send to audio frequency power amplifier and pushes loudspeaker sounding.
The silicon tuner is integrated high-frequency amplifier, frequency mixer, oscillator, filter, locking phase on a silicon wafer
Ring, agc circuit and interface circuit.
The intermediate frequency demodulation replaces with ceramic resonator by the shunt capacitance in triode emitter following wave detector to constitute.
Wave band switching is exempted from beneficial having the technical effect that, exempts from AM/FM switching, and easy to operate, structure is simple, reduces volume,
It is suitble to be made into portable device.The single and complete tuning framework of silicon tuner reduces discrete component, and it is difficult to advantageously reduce production
Degree and raising complete machine stability.
Detailed description of the invention
Fig. 1 is the system block diagram of the utility model；
Fig. 2 is the signal section circuit diagram of the utility model；
Fig. 3 is the MCU manipulation element circuit schematic diagram of the utility model.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawings of the specification.
In Fig. 2, radio signal enters silicon tuner U1 by antenna ANT1.Under the control of MCU, through I2C bus, makes
U1 be tuned to needed for frequency, export intermediate-freuqncy signal, send to A point.Intermediate frequency demodulation is made of triode Q1 and peripheral cell, in B point
Demodulate audio signal.After making volume adjustment by potentiometer VR1, send to audio frequency power amplifier U2, push loudspeaker SP1 sounding.
Silicon tuner is using advanced silicon semiconductor technology, high-frequency amplifier, frequency mixer, oscillator, filter, locking phase
Ring, agc circuit and interface circuit etc. are integrated in the new device on a silicon wafer.It just can be changed by control interface programming
Characteristic.TDA18218 is that wherein a silicon tuner, its reception frequency range can reach 26 ~ 1023MHz, and in this frequency
It is divided in range without wave band, one-part form continuously adjustable.Under the action of internal AGC circuit, output center frequency is 4MHz, width
Degree is about 1Vp-pIntermediate-freuqncy signal.
In Fig. 2, it is intermediate frequency demodulation part in dotted line frame, is that the shunt capacitance in triode emitter following wave detector is replaced with pottery
Porcelain resonator is constituted.The principle of emitter following wave detector is that the operating current for amplifying significantly signal amplifier is big, and B point voltage is high；
The operating current for amplifying small amplitude signal amplifier is and then small, and B point voltage is and then low.Shunt capacitance is changed into ceramic resonator
Afterwards, make it in passband, other than having the above-mentioned detection effect to AM signal, nearby also there is frequency-amplitude to resonance frequency
Characteristic, i.e., closer to centre frequency, amplifier operation electric current is bigger, and B point voltage is higher；More deviate centre frequency, amplifier
Operating current is smaller, and B point voltage is lower, that is, plays the frequency discrimination effect to FM signal.
In Fig. 3, MCU manipulates unit by MCU, LCD, key, E2PROM composition.Under the control of MCU, user passes through key
Adjustment receives frequency, is shown by LCD；Later, corresponding I is generated2C bus signals are input to the I of silicon tuner2C bus
Interface, control its be tuned to the reception frequency.E2PROM saves existing just received frequency for power down.
Claims (3)
1. a kind of silicon tuner wide band receiver, including antenna, silicon tuner, intermediate frequency demodulation, audio frequency power amplifier, loudspeaker, MCU
Unit is manipulated, it is characterized in that: radio signal is input to silicon tuner by antenna, is controlled by MCU manipulation unit and is tuned to receive
Frequency exports intermediate-freuqncy signal, then through intermediate frequency demodulation output audio signal, send to audio frequency power amplifier and push loudspeaker sounding.
2. receiver according to claim 1, it is characterized in that: the silicon tuner is to integrate high frequency on a silicon wafer
Amplifier, frequency mixer, oscillator, filter, phaselocked loop, agc circuit and interface circuit.
3. receiver according to claim 1, it is characterized in that: the intermediate frequency demodulation is by the side in triode emitter following wave detector
Road capacitor replaces with ceramic resonator to constitute.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920341969.3U CN209283220U (en) | 2019-03-19 | 2019-03-19 | A kind of silicon tuner wide band receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920341969.3U CN209283220U (en) | 2019-03-19 | 2019-03-19 | A kind of silicon tuner wide band receiver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209283220U true CN209283220U (en) | 2019-08-20 |
Family
ID=67606642
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920341969.3U Active CN209283220U (en) | 2019-03-19 | 2019-03-19 | A kind of silicon tuner wide band receiver |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209283220U (en) |
-
2019
- 2019-03-19 CN CN201920341969.3U patent/CN209283220U/en active Active
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