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参数资料
| 型号： | PMB2304T |
| 厂商： | INFINEON TECHNOLOGIES AG |
| 元件分类： | PLL合成/DDS/VCOs |
| 英文描述： | PLL FREQUENCY SYNTHESIZER, 220 MHz, PDSO14 |
| 封装： | PLASTIC, SO-14 |
| 文件页数： | 7/36页 |
| 文件大小： | 2613K |
| 代理商： | PMB2304T |
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Functional Description
3 - 8
PMB 2304T
preliminary
Wireless Components
Specification, August 2003
This is done as follows:
1. Setting of synchronous data acquisition by status 2.
2. Programming of the R-counter, status 1 (optional)-data is being loaded into
shadow registers.
3. Programming of the N- or N/A-counter-data is being loaded into shadow reg-
isters, the EN-signal starts the synchronous loading procedure.
4. Synchronous programming – which means data transfer of all data from the
shadow registers to the data registers – takes place at that point in time
when the respective counter reaches “zero + 1”, the maximum repetition rate
for channel change is therefore f
FI:N.
5. Transfer of status 1 information into the corresponding data register is tied
to the N-counter loading, but follows the loading of the N-data register in the
distance of one N-counter dividing ratio, this guarantees that for example a
new PD-current value becomes valid at the same time when the counters
are loaded with the new data.
Synchronous avoids additional phase error caused by programming. Synchro-
nous data acquisition is of especial advantage, when large steps in frequency
are to be made in a short time. For this purpose a high reference frequency can
be programmed in order to achieve rapid – “rough” – transient response. This
method increases the fundamental frequency nearly by the square route of the
reference frequency relation. When rough lock is achieved, another synchro-
nous data transfer is needed to switch back to the original channel spacing. A
“fine” lock in will finish the total step response. It may not be necessary to
change reference frequency, but it make sense to perform synchronous data
acquisition in any case. Especially for GSM, PCN, PCS, DECT, DAMPS, PHP
systems the synchronous mode should be used to get best performance of the
PMB 2304T.
Standby Condition:
The PMB 2304T has two standby modes (standby 1, 2) to reduce the current
consumption.
Standby 1 switches off the whole circuit, the current consumption is reduced
below 1
A.
Standby 2 switches off the counters, the charge pump and the outputs, only the
preamplifiers stay active.
For the influence on the output signals see standby table (5-10).
f
RN, fVN,
Φ
RN, ΦVN are the inverted signals of fR, fV,ΦR, ΦV.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| PMB2306 | 制造商:INFINEON 制造商全称:Infineon Technologies AG 功能描述:PLL-Frequency Synthesizer PMB2306R/PMB2306T Version 2.2 |
| PMB2306R | 制造商:INFINEON 制造商全称:Infineon Technologies AG 功能描述:PLL-Frequency Synthesizer PMB2306R/PMB2306T Version 2.2 |
| PMB2306T | 制造商:INFINEON 制造商全称:Infineon Technologies AG 功能描述:PLL-Frequency Synthesizer PMB2306R/PMB2306T Version 2.2 |
| PMB2306T/V2.2 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Serial-Input Frequency Synthesizer |
| PMB2307 | 制造商:INFINEON 制造商全称:Infineon Technologies AG 功能描述:GSM Receiver PCN/PCS Receiver |
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