參數(shù)資料
型號: LA1784
廠商: Sanyo Electric Co.,Ltd.
英文描述: Single-Chip Tuner IC for Car Radios
中文描述: 單芯片調(diào)諧器IC的汽車收音機
文件頁數(shù): 4/50頁
文件大小: 568K
代理商: LA1784
Function List
FM Front End (Equivalent to the Sanyo LA1193)
Double input type double balanced mixer
Pin diode drive AGC output
MOSFET second gate drive AGC output
Keyed AGC adjustment pin
Differential IF amplifier
Wide band AGC sensitivity setting pin, and narrow
band AGC sensitivity setting pin
Local oscillator
FM IF
IF limiter amplifier
S-meter output (also used for AM) 6-stage pickup
Multipath detection pin (shared FM signal meter)
Quadrature detection
AF preamplifier
AGC output
Band muting
Weak input muting
Soft muting adjustment pin
Muting attenuation adjustment pin
IF counter buffer output (also used for AM)
SD (IF counter buffer on level) adjustment pin
SD output (active high) (also used for AM)
Noise Canceller
High-pass filter (first order)
Delay circuit based low-pass filter (fourth order)
Noise AGC
Pilot signal compensation circuit
Noise sensitivity setting pin
Function for disabling the noise canceller in AM
mode
Multiplex Functions
Adjustment-free VCO circuit
Level follower type pilot canceller circuit
HCC (high cut control)
Automatic stereo/mono switching
VCO oscillation stop function (AM mode)
Forced monaural
SNC (stereo noise controller)
Stereo display pin
Anti-birdie filter
AM
Double balanced mixer (1st, 2nd)
IF amplifier
Detection
RF AGC (narrow/wide)
Pin diode drive pin
IF AGC
Signal meter output (also used for FM)
Local oscillator circuits (first and second)
Local oscillator buffer output
IF counter buffer output (also used by the FM IF)
SD (IF counter buffer on level) adjustment pin
SD output (active high) (also used for AM)
Wide AGC
Detection output frequency characteristics
adjustment pin (low cut, high deemphasis)
AM stereo buffer
MRC (multipath noise rejection circuit)
AM/FM switching output (linked to the FM V
CC
)
No. 6039-4/50
LA1784M
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