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| CDP1802ACE资料 | |
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CDP1802ACE PDF Download |
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File Size : 116 KB
Manufacturer:HARSS Description:The transmitter consists of a PLL frequency synthesiser and a power amplifier. The frequency synthesiser consists of a voltage controlled oscillator (VCO), a crystal oscillator, prescaler, programmable frequency dividers and a phase-detector. The loop-filter is external for flexibility The VCO is a Colpitts oscillator and needs an external resonator and varicap. FSK modulation can be applied externally to the VCO or to the crystal oscillator. The synthesiser has two different, N and M, frequency dividers. For low bitrate applications (approximate 100 bps) FSK modulation can be implemented by switching between these dividers. The lengths of the N and M registers are 12 and 10 bits respectively. For all types of FSK modulation, data is entered at the Data IXO pin (see application circuit, Figure 7). In receive mode the PLL synthesiser generates the local oscillator (LO) signal. The N and M values that give the LO frequency are stored in the N0 and M0 registers. The receiver is a zero intermediate frequency (IF) type in order to make channel filtering possible with low- power integrated low-pass filters. The receiver consists of a low noise amplifier (LNA) that drives a quadrature mixer pair. The mixer outputs feed two identical signal channels in phase quadrature. |
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| 1PCS | 100PCS | 1K | 10K | ||
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型 号：CDP1802ACE 厂 家：HARSS 封 装：DIP40 批 号：99+ 数 量：130 说 明：绝对原装正品底价 |
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运 费： 所在地： 新旧程度： |
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| 联系人：龙先生,胡小姐 |
| 电 话：0755-83226907,83229025,83226903 |
| 手 机：13927436669 |
| QQ：1109170345,514620629 |
| MSN：hlh1999@msn.com |
| 传 真：0755-83226930 |
| EMail：sale@cdf-ic.com |
| 公司地址： 深圳市福田区中航路新亚洲电子商城国利大厦710室. |
