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參數(shù)資料
| 型號(hào)： | RX3400 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | Low Power ASK Receiver IC |
| 中文描述： | 低功率ASK接收芯片 |
| 文件頁數(shù)： | 6/7頁 |
| 文件大?。?/td> | 87K |
| 代理商： | RX3400 |
RX3400
the wireless IC company
Page 6
March 2001
Functional Description
The RX3400 ASK receiver IC incorporates an LNA; mixer; PLL-based local oscillator
including VCO, fixed divider (
÷ 64
), reference crystal oscillator, phase-frequency detector
(PFD), and charge pump; IF filter; logarithmic amplifier; data filter; peak detector; and 1-
bit comparator and is capable of demodulating ASK input signals.
PLL Power-down Function
The PLL portion of the IC can be powered up and down through the control of the PD
input (pin 14). During PLL power down operation, the reference crystal oscillator, fixed
VCO divider, PFD, and charge pump are all shut off and the current consumption of the IC
drops by approximately 600
μ
A. The VCO circuitry remains on and may be configured to
operate as a buffer amplifier for an external SAW-based oscillator.
1-bit Comparator
The integrated 1-bit comparator operates as a data slicer and “squares up” the data filtered
RSSI output from the logarithmic amplifier. The decision threshold voltage level for the
1-bit comparator is stored on an external capacitor connected to the ASKREF pin.
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