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參數(shù)資料
| 型號： | μPC2775GS |
| 廠商： | NEC Corp. |
| 英文描述： | Frequecy Down Converter For VHF-UHF Band TV/VCR Tuner(應(yīng)用于VHF-UHF調(diào)諧器的下變頻轉(zhuǎn)換器) |
| 中文描述： | Frequecy下變頻器甚高頻，超高頻波段電視/錄像機(jī)調(diào)諧器（應(yīng)用于甚高頻，超高頻調(diào)諧器的下變頻轉(zhuǎn)換器） |
| 文件頁數(shù)： | 3/16頁 |
| 文件大?。?/td> | 128K |
| 代理商： | ΜPC2775GS |
μ
PC2775GR/GS
3
Data Sheet P10194EJ3V0DS00
PIN EXPLANATION
- - - - - - - - - - - - -
6.25
- - - - - - - - - - - - -
3.90
- - - - - - - - - - - - -
3.90
- - - - - - - - - - - - -
- - - - - - - - - - - - -
9.0
- - - - - - - - - - - - -
- - - - - - - - - - - - -
0.0
- - - - - - - - - - - - -
5.90
- - - - - - - - - - - - -
5.90
- - - - - - - - - - - - -
6.90
Pin No.
1
2
3
4
5
6
7
8
9
10
Symbol
UOSC
collector
(Tr. 1)
UOSC
base (Tr. 2)
UOSC
base (Tr. 1)
UOSC
collector
(Tr. 2)
UB
OSC
output
GND
VOSC
base (Tr. 1)
VOSC
base (Tr. 2)
VOSC
collector
(Tr. 1)
Equivalent circuit
Function and Explanation
Collector pin of UHF oscillator.
Assemble LC resonator with 2 pin
through capacitor ~ 1 pF to oscillate
with active feedback Loop.
Base pin of UHF oscillator with
balance amplifier. Connected to LC
resonator through feedback capacitor
~ 300 pF.
Base pin of UHF oscillator with
balance amplifier. Connected to LC
resonator through feedback capacitor
~ 300 pF.
Collector pin of UHF oscillator with
balance amplifier. Assemble LC
resonator with 3 pin through capacitor
~ 1 pF to oscillate with active feedback
Loop. Double balanced oscillator with
transistor 1 and transistor 2.
Switching pin for VHF or UHF
operation.
UHF operation = 9.0 V
VHF operation = GND
UHF and VHF oscillator output pin.
In case of F/S tuner application,
connected PLL synthesizer IC’s input
pin.
VHF and UHF oscillators’ GND pin.
Base pin of VHF oscillator with
balance amplifier.
Grounded through capacitor ~ 10 pF.
Base pin of VHF oscillator with
balance amplifier. Assemble LC
resonator with 10 pin to oscillate with
active feedback Loop.
Base pin of VHF oscillator with
balance amplifier. Connected to LC
resonator through feedback capacitor
~ 3 pF.
Pin voltage TYP.
above: V mode (V)
below: U mode (U)
6.90
6.00
6.00
6.90
6.25
0.0
5.40
5.40
0.0
3.50
3.50
6.20
2
4
1
3
5
REG.
6
From
OSC
9
10
8
REG.
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