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參數(shù)資料
| 型號： | T4260 |
| 廠商： | Atmel Corp. |
| 英文描述： | AM/FM Front End IC |
| 中文描述： | 調(diào)幅/調(diào)頻前端IC |
| 文件頁數(shù)： | 24/31頁 |
| 文件大小： | 299K |
| 代理商： | T4260 |
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24
T4260
4528G–AUDR–12/03
Figure 11.
Block Diagram of the PLL Core
PLL Core Block Diagram
Description
The two N-dividers are stored in two 18-bit memory register (LATCH N-DIV) and the
R-divider in a 14-bit memory register (LATCH R-DIV). One of the the two N-dividers
(N1 or N2) can be activated by Bit 5 as active N-divider (with the 18-bit multiplexer
MUX).
The (divider) 2-bit shift mode can be activated with Bit 32 = 0. The N- and R-divider are
shifted two bits to the right in this shift mode. Because the two lowest R-divider bits
(Bit 124 and Bit 125) are 0 they do not have to be evaluated. In opposite to the R-divider
the lowest two N-divider bits (Bit 102 and Bit 103 or Bit 80 and Bit 81, depends on the
active N-divider) are special evaluated in the ACCU block if fractional mode is active
(Bit 144 = 0). The two lowest N- and R-divider bits are also called shift bits.
The SWITCH N+1, N block is steering the division through N or N+1 in the N-divider if
fractional and 2-bit shift mode are active. There is only a division by N if the fractional
mode is deactivated in 2-bit shift mode.
The output signals of the 18-bit N-divider and 14-bit R-divider will be compared in the
PHASEDETECTOR which one activates the sink and source currents of the charge
pumps (CP).
LATCH R - DIV.
SHIFT 2 BIT
R - DIVIDER
DELAYTIME high
cur. CP
SWITCH
PHASE
DETECTOR
CHARGE
PUMP
AM/FM
FILTER
N / N+1
DIVIDER
PREAMP
SWITCH N+1, N
ACCU 2 - BIT
SHIFT 2 BIT
MUX N1 N2
LATCH N - DIV 1
LATCH N - DIV 2
VCO
FM - LOOP
FILTER
AM - LOOP
FILTER
B60, B144
2-BIT (LSB)
18 - BIT
18 - BIT
BIT 18
BIT 32
Fref
14 - BIT
B145
AM / FM
HCDEL 1 HCDEL 2
B62,63
B61
B5
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| T4260IL | AM/FM Front End IC |
| T4260ILQ | AM/FM Front End IC |
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| T450 | DIL 14 PIN SINGLE OUTPUT |
| T400 | DIL 14 PIN SINGLE OUTPUT |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| T4260_08 | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:AM/FM Front End IC |
| T4260_09 | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:AM/FM Front End IC |
| T4260IL | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:AM/FM Front End IC |
| T4260-IL | 功能描述:IC RECEIVER AM/FM FRONT 44-SSOP RoHS:否 類別:RF/IF 和 RFID >> RF 接收器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS 產(chǎn)品變化通告:Product Discontinuation 09/Jan/2012 標(biāo)準(zhǔn)包裝:50 系列:* 頻率:850MHz ~ 2.175GHz 靈敏度:- 數(shù)據(jù)傳輸率 - 最大:- 調(diào)制或協(xié)議:- 應(yīng)用:* 電流 - 接收:* 數(shù)據(jù)接口:PCB，表面貼裝 存儲容量:- 天線連接器:PCB，表面貼裝 特點:- 電源電壓:4.75 V ~ 5.25 V 工作溫度:0°C ~ 85°C 封裝/外殼:40-WFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:40-TQFN-EP（6x6） 包裝:托盤 |
| T4260ILQ | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:AM/FM Front End IC |
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