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参数资料
| 型号： | μPC2775GR |
| 厂商： | NEC Corp. |
| 英文描述： | Frequecy Down Converter For VHF-UHF Band TV/VCR Tuner(应用于VHF-UHF调谐器的下变频转换器) |
| 中文描述： | Frequecy下变频器甚高频，超高频波段电视/录像机调谐器（应用于甚高频，超高频调谐器的下变频转换器） |
| 文件页数： | 3/16页 |
| 文件大小： | 128K |
| 代理商： | ΜPC2775GR |
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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