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參數(shù)資料
| 型號(hào)： | MC145106 |
| 廠商： | Motorola, Inc. |
| 英文描述： | N+1 and OR-ing Power Rail Controller 14-TSSOP -40 to 85 |
| 中文描述： | 鎖相環(huán)頻率合成器 |
| 文件頁(yè)數(shù)： | 5/8頁(yè) |
| 文件大?。?/td> | 115K |
| 代理商： | MC145106 |
MC145106
5
MOTOROLA
PLL SYNTHESIZER APPLICATIONS
The MC145106 is well suited for applications in CB radios
because of the channelized frequency requirements. A typi-
cal 40 channel CB transceiver synthesizer, using a single
crystal reference, is shown in Figure 3 for receiver IF values
of 10.695 MHz and 455 kHz.
In addition to applications in CB radios, the MC145106 can
be used as a synthesizer for several other systems. Various
frequency spectrums can be achieved through the use of
proper offset, prescaling, and loop programming techniques.
In general, 300 – 400 channels can be synthesized using a
single loop, with many additional channels available when
multiple loop approaches are employed. Figures 4 and 5 are
examples of some possibilities.
In the aircraft synthesizer of Figure 5, the VHF loop (top)
will provide a 50 kHz, 360 channel system with 10.7 MHz
R/T offset when only the 11.0500 MHz (transmit) and
12.1200 MHz (receive) frequencies are provided to mixer #1.
When these signals are provided with crystal oscillators, the
result is a three crystal 360 channel, 50 kHz step synthesizer.
When using the offset loop (bottom) in Figure 5 to provide the
indicated injection frequencies for mixer #1 (two for transmit
and two for receive) 360 additional channels are possible.
This results in a 720–channel, 25 kHz step synthesizer which
requires only two crystals and provides R/T offset capability.
The receive offset value is determined by the 11.31 MHz
crystal frequency and is 10.7 MHz for the example.
The VHF marine synthesizer in Figure 4 depicts a single
loop approach for FM transceivers. The VCO operates on fre-
quency during transmit and is offset downward during re-
ceive. The offset corresponds to the receive IF (10.7 MHz) for
channels having identical receive/transmit frequencies (sim-
plex), and is (10.7 – 4.6 = 6.1) MHz for duplex channels. Car-
rier modulation is introduced in the loop during transmit.
Figure 3. Single Crystal CB Synthesizer Featuring On–Frequency VCO During Transmit
26.965 – 27.405 MHz
(TRANSMIT)
26.510 – 26.950 MHz
(RECEIVE)
RECEIVER 1ST
LOCAL OSC SIGNAL
TO RECEIVER
2ND MIXER
25.6 MHz
X 5
MIXER
16.270 – 16.710 MHz
10.24 MHz
MIXER
BUFFER
GND
VDD
5.0 kHz
BUFFER
VCO
LOOP
FILTER
PHASE
DETECTOR
LD
R/T
SWITCH WAFERS
MC145106
PROGRAMMABLE
DIVIDER
÷
29/210
÷
2
OSC
10.24
MHz
1.365 – 1.805 MHz (TRANSMIT)
0.91 – 1.35 MHz (RECEIVE)
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MC145106DW | N+1 and OR-ing Power Rail Controller 14-TSSOP -40 to 85 |
| MC145106P | N+1 and OR-ing Power Rail Controller 14-TSSOP -40 to 85 |
| MC14510BCP | N+1 and OR-ing Power Rail Controller 14-TSSOP -40 to 85 |
| MC14510BD | N+1 and OR-ing Power Rail Controller 14-TSSOP -40 to 85 |
| MC14511BCL | N+1 and OR-ing Power Rail Controller 14-TSSOP -40 to 85 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MC145106DW | 制造商:Motorola Inc 功能描述: |
| MC14510B | 制造商:Motorola Inc 功能描述: |
| MC14510BCP | 制造商:Panasonic Industrial Company 功能描述:IC |
| MC14510BF | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| MC14510BFEL | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
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