201023533 穴、發明說明： 【發明所屬之技術領域】 本發明涉及信號與資訊處理領域，尤其是涉及射頻接收技 街0 【先前技術】 傳統的無線遙控接收裝置多採用超再生接收電路，雖然超 © #生接收電路具有較南的靈敏度，但具有頻率不穩定，選擇性 較差的缺點，還有一部分傳統的無線遙控接收裝置中本振外接 %件㈣可調電感和電容，當本振頻率偏離時，採用手動調節 電感的方式，使用不方便，還有的無線遙控接收裝置採用晶振 羞生本振頻率信號，但是晶振比LC元器件成本高出报多。 【發明内容】 參 纟發明旨在解決現有技術的不足，提供-種可以採用低成 本LC振盪器的無線遙控接收裝置。 無線遙控接收裝置包括： _本振：接收外界元件L、C產生頻率為忍的本振頻率信號； -射頻放大器：用於接收放大天線的頻率為力的信號； -混頻器··將本振頻率信號和射頻放大器接受的天線頻率 仏號共同輸入混頻電器，輸出中頻信號A ; •帶通濾波器：接混頻器的中頻信號心後輸出； 其特徵在於混頻器輸出的中頻信號頻率A為頻率為2 201023533 MHz的信號，當外界元件『在现變化的時候，中頻信號頻 率4會在0.6]\41^到3.5]^1^範圍襄跟隨1^的變化； 無線遙控接收裝置的特徵在於帶通濾波器的帶寬設置為 2.6 MHz，隨溫度工藝略有漂移，帶通中心頻率為2馳。 本發明的有益效果是，採用本發明的無線遙控接收裝置， 可以使得以2MHZ為中心，相應變化_1.38MHz〜+1.526 MHz ❹ 的中頻信號基本上沒有衰減地通過，同時又抑制了大部分帶外 雜訊。這樣晶片在沒有可調雷咸& $ 乃你次韦J調電感的情況下，可以支援到固定的 元器件·實際值偏離標稱值仏5%的誤差，可以降低採購 LC元件的成本，省去了车 — 啗舌了手動調即電感的這一繁瑣過程，相比 曰曰曰振實現本振的方案本發明能提供更低的成本。 【實施方式】 以下結合附圖對本發明内容進一步說明。 無線遙控接收裝置，如圖1所示，包括： 信號； -本振（1):接收外界元件L、c產生頻率為/io的本振 頻率 -射頻放大器⑺：用於接收放大天線的頻率為、信穿, -混頻器（3):將本振頻率信號和射頻放大器接受的天線， 頻率信號共同輪入混頻電器，輸出中頻信號& ; ^ -帶通濾波器（4):接混頻器的中頻信號么後輪出， 混頻器（3)輸出中頻信號心與本振頻率信號^以 故大器（2)接收頻率為力的信，的三個信號之間的頻率關係^ 201023533 =’±//F，取公式中的正值，即人。=力+丨。 假設分立元件L、c的值同時偏離+/_5%，沒有偏移的情 礼下，本振（1 )的中心頻率4理論值為29 MHz，則接收電路 Λ振（1 )的中心頻率偏移計算如下： 假設L、C各偏移+ 5 %， ΔΛ〇~=2^'(vi.05Z-l.05C ~vfe) = '°·0476·= ~l3SMHz 9 假設L、C各偏移-5%201023533 Acupuncture, invention description: [Technical field of invention] The present invention relates to the field of signal and information processing, in particular to radio frequency receiving technology street [Prior Art] Conventional wireless remote control receiving device adopts super regenerative receiving circuit, although super© #生接收电路 has souther sensitivity, but has the disadvantages of unstable frequency and poor selectivity. There is also a part of the traditional wireless remote control receiver. The local oscillator is connected to the external component. (4) Adjustable inductance and capacitance. When the local oscillator frequency deviates. The method of manually adjusting the inductance is inconvenient to use, and the wireless remote control receiving device uses the crystal oscillator to shimmer the local oscillator frequency signal, but the crystal oscillator has a higher cost than the LC component. SUMMARY OF THE INVENTION The present invention is directed to solving the deficiencies of the prior art and provides a wireless remote control receiving device that can employ a low cost LC oscillator. The wireless remote control receiving device comprises: _ local oscillator: receiving the local component L, C to generate a frequency of the local oscillator frequency signal; - radio frequency amplifier: a signal for receiving the frequency of the amplifying antenna as a force; - a mixer · The vibration frequency signal and the antenna frequency 接受 received by the RF amplifier are input to the mixing device together, and the output IF signal A; • Bandpass filter: the IF signal after the mixer is output; characterized by the output of the mixer The frequency of the intermediate frequency signal A is a signal with a frequency of 2 201023533 MHz. When the external component is changed, the frequency of the intermediate frequency signal 4 will be in the range of 0.6]\41^ to 3.5]^1^, followed by the change of 1^; The wireless remote control receiver is characterized in that the bandwidth of the band pass filter is set to 2.6 MHz, with a slight drift with temperature, and the center frequency of the band pass is 2 achievable. The invention has the beneficial effects that the wireless remote control receiving device of the invention can make the intermediate frequency signal with the corresponding change of _1.38 MHz~+1.526 MHz 为 centered at 2 MHZ substantially without attenuation, and at the same time suppress most of the Out-of-band noise. In this way, the wafer can support the fixed component and the actual value deviates from the nominal value by 5% error without the adjustable Thunder & $, but it can reduce the cost of purchasing the LC component. The vehicle is eliminated - the cumbersome process of manually adjusting the inductance is achieved, and the invention can provide a lower cost than the scheme of realizing the local oscillator. [Embodiment] Hereinafter, the contents of the present invention will be further described with reference to the accompanying drawings. The wireless remote control receiving device, as shown in FIG. 1, includes: a signal; - local oscillator (1): receiving external components L, c generating a local oscillator frequency having a frequency of /io - a radio frequency amplifier (7): a frequency for receiving the amplifying antenna is , letter wear, - mixer (3): the local oscillator frequency signal and the antenna received by the RF amplifier, the frequency signal is rotated into the mixing device, the output IF signal &; ^ - bandpass filter (4): After the IF signal of the mixer is turned on, the mixer (3) outputs the IF signal center and the local frequency signal ^ between the three signals of the receiver (2) receiving the frequency as the force The frequency relationship ^ 201023533 = '± / / F, take the positive value in the formula, that is, people. = force + 丨. Assume that the values of the discrete components L and c deviate from +/_5% at the same time. Without the offset, the theoretical value of the center frequency of the local oscillator (1) is 29 MHz, and the center frequency of the receiving circuit is (1). The shift is calculated as follows: Suppose L and C offset + 5 %, ΔΛ〇~=2^'(vi.05Z-l.05C ~vfe) = '°·0476·= ~l3SMHz 9 Suppose L and C offsets -5%
Afw+ = 2^{V0.95I.0.95C^7^)=。編·^^ =1 ·526廳 對於固定的射頻放大器接收頻率為力的信號，當本振（1) 忍偏離△/時，混頻器（3 )輸出的中頻信號△頻率也相應地偏 灕Δ/，所以中頻信△頻率在L、c同時變化5%的時候，相應 變化-1.38 MHz〜+1.526 MHz。 混頻器（3)輸出的中頻信號頻率丨為頻率為2MHz的信 參號，當外界元件LC在±5%變化的時候，中頻信號頻率心會在 0.6MHz到3·5ΜΗζ範圍裏跟隨的變化； 帶通濾波器（4 )的帶寬設置為2.6 MHz，隨溫度工藝略 有漂移，帶通中心頻率為2 MHz。 另外如果中頻信號頻率太高時，帶通濾波器（4 )上比較 難實現或者會需要犧牲較大的功耗，中頻信號頻率太低時，低 頻的雜訊信號容易通過，因此是混頻器（3)的令頻信號頻率 的最佳值為2 MHz，帶通滤波器（4)的帶寬最佳值為2·6ΜΗζ 201023533 時，這樣可以使以2 MHz為中心，相應變化_ i .3 8 MHz〜+ι .5 26 MHz的中頻信號基本上沒有衰減地通過，同時又抑制了大立 帶外雜訊，帶寬太寬，會有太多的雜訊進入 。刀 ’ 在、，又有可調 電感的情況下，可以支援到固定的L、c元器件實際值偏離標 稱值+/-5%的誤差，可以降低採購LC元件的成本省去了手 動調節電感的這一繁項過程，相比晶振實現本振的方案本發明 能提供更低的成本。 ❹ 應該理解到的是：上述實施例只是對本發明的說明，而不 是對本發明的限制，任何不超出本發明實質精神範圍内的發明 創造修改、替換，均落入本發明保護範圍之内。 【圖式簡單說明】 圖1無線遙控接收裝置。 圖2L、C各變化+/_5%時混頻器混頻後的中頻乂變化範圍 不意圖。 圖3帶通濾波器中心頻率和帶寬示意圖。 【主要元件符號說明】 1.. 本振 2.. 射頻放大器 3.. 混頻 4.. 帶通濾波器 6Afw+ = 2^{V0.95I.0.95C^7^)=. Edit ·^^ =1 · 526 hall for the fixed RF amplifier receiving frequency as the force signal, when the local oscillator (1) is forbidden to deviate from △ /, the frequency of the intermediate frequency signal △ output by the mixer (3) is also correspondingly biased漓Δ/, so the intermediate frequency signal △ frequency changes by 5% at the same time, the corresponding change -1.38 MHz ~ + 1.526 MHz. The frequency of the intermediate frequency signal output by the mixer (3) is a reference signal with a frequency of 2 MHz. When the external component LC changes by ±5%, the frequency of the intermediate frequency signal will follow in the range of 0.6 MHz to 3.5 ΜΗζ. The bandpass filter (4) has a bandwidth set to 2.6 MHz with a slight drift with temperature and a bandpass center frequency of 2 MHz. In addition, if the frequency of the IF signal is too high, the bandpass filter (4) is more difficult to implement or it may need to sacrifice greater power consumption. When the IF signal frequency is too low, the low frequency noise signal is easy to pass, so it is mixed. The optimum value of the frequency of the frequency signal of the frequency converter (3) is 2 MHz, and the optimal bandwidth of the band-pass filter (4) is 2·6ΜΗζ 201023533, which can make the corresponding change according to 2 MHz. .3 8 MHz~+ι .5 The 26 MHz IF signal passes through substantially no attenuation, while suppressing the out-of-band noise. The bandwidth is too wide and too much noise is entering. In the case of a knife, it can support the error that the actual value of the fixed L and c components deviates from the nominal value by +/- 5%, which can reduce the cost of purchasing the LC component and eliminate the manual adjustment. This complicated process of the inductor provides a lower cost than the scheme in which the crystal oscillator achieves the local oscillator. It is to be understood that the above-described embodiments are merely illustrative of the present invention, and are not intended to limit the scope of the invention, and any modifications and substitutions of the invention are possible without departing from the spirit and scope of the invention. [Simple diagram of the diagram] Figure 1 wireless remote control receiver. The variation of the intermediate frequency 混 after the mixing of the mixers in Fig. 2L and C is +/_5% is not intended. Figure 3 is a schematic diagram of the center frequency and bandwidth of the bandpass filter. [Main component symbol description] 1. Local oscillator 2. RF amplifier 3. Mixing 4. Bandpass filter 6