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BK4819 датащи(PDF) 2 Page - Beken Corporation

номер детали BK4819
подробное описание детали  Analog Two Way Radio IC
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производитель  BEKEN [Beken Corporation]
домашняя страница  http://www.bekencorp.com/en
Logo BEKEN - Beken Corporation

BK4819 датащи(HTML) 2 Page - Beken Corporation

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BK4819
Rev.1.0
Copyright©2018 by Beken Corporation
BK4819
1 Functional Description
FSK Mod.
Com press
Emphasis
Scrambling
CTCCS
PLL
Modulator
De-
Emphasis
DAC
ADC
Tra nsm itter
Receiver
Squelc h
PLL
Filter
Demod
RSSI
ADC
ADC
MUX
MUX
MUX
Voice Act ivate
Switch
De-
Scrambling
FSK Demod.
LPF
CTCCS
BPF
26MHz
SPI
M
C
U
AGC
MIS C
CDCCS
SELCALL
DTMF
CDCCS
SELCALL
DTMF
Expander
Figure 1. Functional Block Diagram
1.1
Overview
The BK4819 integrates high performance PLL, ADC, DAC, and advanced digital
signal processing capability on a single chip. The digital low-IF image rejection
architecture enables it to work with a very simple MCU as a two way radio
communication system. On-chip flexible and precise continuous and discrete
tone generator and detector enable a secure link and digital signaling.
1.2
RF Transceiver
BK4819 includes an integrated RF transceiver which is compliant with the
specification most country in the world. The RF transceiver requires the following
external components to operate:
1) A 26MHz crystal;
2) Simple input matching and output matching;
3) Several SMD capacitors for decoupling and DC blocking.
1.2.1 FM Receiver
The receiver implements a low-IF image rejection architecture, which is
composed with two parts: RF front-end and IF part. The RF front-end comprises
a LNA and a quadrature mixer. The IF part comprises a low-pass filter (LPF) for
matching
相同 相似配对
decoupling分离
front-end
前置
comprises组成构成


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