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參數(shù)資料
| 型號： | LV25300M |
| 元件分類： | 調(diào)諧器 |
| 英文描述： | 2-BAND, AUDIO TUNER, PQFP80 |
| 封裝： | QIP-80 |
| 文件頁數(shù)： | 3/4頁 |
| 文件大?。?/td> | 64K |
| 代理商： | LV25300M |
LV25300M
No.8320-3/4
Bus control circuit
Automatic adjustment
Switching control
FM ANT tuning circuit fc control
AM/FM reception switching
FM RF tuning circuit fc control
AM/FM RF AGC sensitivity setting: 4 bits
AM/FM IF gain adjustment
FM keyed AGC control: 4 bits
FM/AM W-AGC sensitivity adjustment
AM/FM RF tuning DAC (9 bits × 2)
FM/AM N-AGC sensitivity adjustment
AM/FM SD control ON/OFF
FM S-meter shift
AM/FM IF counter output control ON/OFF
AM/FM SD sensitivity setting
AM oscillator 1 divider setting
NULL adjustment
SEEK/receive mode switching
AFC band width
Connection to CDSP300 (interface)
Diversity
AM/FM IF output (450kHz)
Noise amplifier, noise, and AGC circuits
AM/FM S-meter output, AC/DC 2 systems
Noise density coefficient circuit
AM-NC gate trigger output
Antenna selection output
Generating a signal for the antenna switching frequency
and positioning antenna
Weak electric field detection and antenna positioning
Block Diagram
DAC
CIRCUIT
ANT-D
Keyed
AGC
FM
1st
MIX
AM
1st
MIX
W
AGC
ANT-D
MIX
COIL
CF 10.7MHz
FM RF tuner circuit
FM ANT tuner circuit
Limiter
AMP
2ndMIX
AUDIO
CIRCUIT
DETECTER
FM
1stAMP
MUTE
CIRCUIT
AFC
AM
2ndMIX
Differential
AMP2
S-METER
SD
IF AGC
DETECTET
TRIG
AM
1stAMP
Differential
AMP1
low cut
AMP
AM-NC
NC STOP
CF 10.7MHz
AM TRANS
N AGC
W
AGC
M AGC
CF 450kHz
OSC
COIL
tuner
circuit
2ndIFAMP
S-METER
(DC/AC)
SD
450kHz
OUTPUT_BUFFER
ECL
1/4, 1/6
1/8, 1/10
swallow
counter
phase
det
charge
pump
6/8bit AD
converter
LPF
NMOS Tr
IN 1
IN 2
IN 3-1
IN 3-2
IN 3-3
IN 3-4
R-CTR
P-CTR
IF COUNTER
POWER ON
RESET
NOIZE AMP
MAIN FIX
CIRCUIT
LOGIC
DIVIDER
XTAL 10.25MHz
XTAL
OSC
RF
FM RF AMP circuit
RF
AM RF AMP circuit
AM ANT circuit
BPF
AM detector
BUS
BUS-
3V REG
CURRENT
DRIVER
ANT selector
Time constant
generator
COUNTER
DAC block
PLL
FE
AM block
FM IF
4.9V REG
2.7V REG
NOIZE
AMP
NOIZE
AGC
Diversity block
FM
Lo/DX
AM
Lo/DX
450kHz
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