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参数资料
| 型号： | PMB2347 |
| 厂商： | INFINEON TECHNOLOGIES AG |
| 英文描述： | RF/IF Double PLL Frequency Synthesizer |
| 中文描述： | 射频/中频双锁相环频率合成器 |
| 文件页数： | 14/35页 |
| 文件大小： | 578K |
| 代理商： | PMB2347 |
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Functional Description
3 - 7
PMB 2347
preliminary
Wireless Components
Specification, August 1999
3.4
Circuit Description
1. General Description
The PMB 2347 consists of two fully programmable PLLs, one for the RF and
one for the IF frequency range. Each PLL contains a high frequency dual mod-
ulus prescaler, an A- and a N-counter with dual modulus control logic, a refer-
ence- (R-) counter, and a phase detector with charge pump output. The two
synthesizers are controlled via the common serial 3-wire interface.
The reference frequency is applied at the common RI-input and divided by the
R-counter of each PLL. Its maximum value is 45 MHz. The RF and IF input fre-
quencies will be divided by the corresponding prescalers with a programmable
32/32 or 64/65 (RF) and 8/9 or 16/17 (IF) divide ratio and the following program-
mable A/N-counters. The maximum RF frequency value is 2.8 GHz and 500
MHz for the IF frequency.
The phase and frequency detectors with the charge pumps have a linear oper-
ating range without a dead zone for very small phase deviations.
The multifunctional output port LD/fo can be programmed as lock detector and
test output.
2. Programming
Programming of the IC is done via the serial data interface. The content of the
bus telegram (serial data format) is assigned to the functional units according
to the address.
The most significant bit (MSB) of the serial data formats is shifted first.
The short control data formatallows a fast PD-current change.
The long control data format allows the programming of asynchronous or syn-
chronous data acquisition of PLL1 (RF), 4 different PD-output current modes for
the PLL1 and 1 PD-output current modes for PLL2, polarity setting of the PD-
output signals, 2 standby modes, charge pump pulse width and the prescaler
divide ratio.
The A/N-counter data format of PLL1 contains the A/N-counter value.. The data
format of PLL2 comprise the counter values as well.
The R-counter data formatcontains the R-counter values.
The PLL1 (RF) of PMB 2347 offers the possibility of synchronous counter and
charge pump current programming to avoid phase errors at the phase detector
when R-
and
A-/N-counter are programmed one after another or the charge
pump current is altered.
Asynchronous Mode:
The serial data is written directly to the data registers of the addressed counter
with the Enable pulse. As each counter is loading the new starting value after it
is decremented to zero“, the counters changes therefore their counter values
asynchronously to the others.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| PMB2349 | 制造商:INFINEON 制造商全称:Infineon Technologies AG 功能描述:Optimized RF/IF Dual PLL Frequency Synthesizer |
| PMB2362 | 制造商:INFINEON 制造商全称:Infineon Technologies AG 功能描述:Wireless Components Dual LNA |
| PMB24 | 制造商:PURDY 制造商全称:PURDY 功能描述:AC Fans and Blowers |
| PMB2400 | 制造商:INFINEON 制造商全称:Infineon Technologies AG 功能描述:GSM RECEIVER CIRCUIT |
| PMB2401 | 制造商:INFINEON 制造商全称:Infineon Technologies AG 功能描述:GSM Receiver Circuit |
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