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參數(shù)資料
| 型號(hào)： | PT4316-XL |
| 廠商： | Princeton Technology Corporation |
| 英文描述： | Low Power 315/433 MHz OOK/ASK Superheterodyne Receiver with SAW-based Oscillator |
| 中文描述： | 低功耗433分之315兆赫元件Ook / ASK超外差接收器與基于SAW振蕩器 |
| 文件頁數(shù)： | 9/27頁 |
| 文件大小： | 501K |
| 代理商： | PT4316-XL |
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Tel: 886-2-66296288
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
AUTO GAIN CONTROL (AGC)
The AGC circuitry monitors the RSSI voltage level. As described above, when the RSSI voltage
reaches a first value corresponding to an RF input level of approximately -60dBm, the AGC reduces
the LNA gain by 20dB, thereby reducing the RSSI output by approximately 280mV. When the RSSI
voltage drops below a level corresponding to an RF input of approximately -66dBm, the AGC sets the
LNA back to high-gain mode.
The change of RSSI voltage versus RF input power is shown as the following figure. When the RSSI
level increases and then exceeds 1.68 V (RF input power rising), the AGC switches the LNA from
high-gain mode to low-gain mode. As RSSI level decreases back to 1.25V (RF input power falling), the
AGC switches the LNA from low-gain mode back to high-gain mode.
PT4316 V1.6
- 9 -
August, 2007
Low Power 315/433 MHz OOK/ASK Superheterodyne
Receiver with SAW-based Oscillator
PT4316
RSSI Curve w/wo AGC Function
1.00
1.15
1.30
1.45
1.60
1.75
1.90
-120
-100
-80
-60
-40
-20
RF Input Power (dBm)
R
RF Power from Low to High
RF Power from High to Low
RSSI Curve without AGC
RSSI vs. RF input power
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| PT4317 | 制造商:PTC 制造商全稱:Princeton Technology Corp 功能描述:PT4317 Low Power 315/433MHz OOK/ASK Superheterodyne Receiver with SAW-Based Oscillator |
| PT431F | 制造商:Sharp Microelectronics Corporation 功能描述: |
| PT4-4 | 制造商:WM BERG 功能描述: |
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