- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄385052 > μPC2771T (NEC Corp.) Medium-Power High-Frequency Amplifier(中等功率的高頻放大器) PDF資料下載
參數(shù)資料
| 型號： | μPC2771T |
| 廠商： | NEC Corp. |
| 英文描述： | Medium-Power High-Frequency Amplifier(中等功率的高頻放大器) |
| 中文描述： | 中等功率高頻放大器（中等功率的高頻放大器） |
| 文件頁數(shù)： | 5/14頁 |
| 文件大?。?/td> | 140K |
| 代理商： | ΜPC2771T |
5
μ
PC2771T
TEST CIRCUIT
Components of test circuit for
measuring electrical characteristics
Example of actual application components
(refer to page 10)
INDUCTOR FOR THE OUTPUT PIN
The internal output transistor of this IC consumes 28 mA, to output medium power. To supply current for output
transistor, connect an inductor between the V
CC
pin (pin 6) and output pin (pin 4). Select large value inductance,
as listed above.
The inductor has both DC and AC effects. In terms of DC, the inductor biases the output transistor with minimum
voltage drop to output enable high level. In terms of AC, the inductor make output-port-impedance higher to get enough
gain. In this case, large inductance and Q is suitable.
For above reason, select an inductance of 100
or over impedance in the operating frequency. The gain is a
peak in the operating frequency band, and suppressed at lower frequencies.
The recommendable inductance can be chosen from example of actual application components list as shown
above.
CAPACITORS FOR THE V
CC
, INPUT, AND OUTPUT PINS
Capacitors of 1 000 pF are recommendable as the bypass capacitor for the V
CC
pin and the coupling capacitors
for the input and output pins.
The bypass capacitor connected to the V
CC
pin is used to minimize ground impedance of V
CC
pin. So, stable bias
can be supplied against V
CC
fluctuation.
The coupling capacitors, connected to the input and output pins, are used to cut the DC and minimize RF serial
impedance. Their capacitance are therefore selected as lower impedance against a 50
load. The capacitors thus
perform as high pass filters, suppressing low frequencies to DC.
To obtain a flat gain from 100 MHz upwards, 1 000 pF capacitors are used in the test circuit. In the case of under
10 MHz operation, increase the value of coupling capacitor such as 10 000 pF. Because the coupling capacitors are
determined by equation, C = 1/(2
π
Rf
C
).
C
1
to C
3
L
Chip capacitor
Coil
Note
1 000 pF
300 nH
C
1
to C
3
L
1 000 pF
50 nH
10 nH
100 MHz or higher
900 MHz band
1.5 GHz band
Chip capacitor
Chip inductor
TYPE
VALUE
VALUE
OPERATING FREQUENCY
TYPE
Note
20.5T, 2 mm I.D.,
φ
0.25UEW
V
CC
1 000 pF
L
C
2
50
OUT
1 000 pF
2, 3, 5
C
1
50
IN
1 000 pF
4
6
1
C
3
相關PDF資料 |
PDF描述 |
|---|---|
| μPC2775GR | Frequecy Down Converter For VHF-UHF Band TV/VCR Tuner(應用于VHF-UHF調諧器的下變頻轉換器) |
| μPC2775GS | Frequecy Down Converter For VHF-UHF Band TV/VCR Tuner(應用于VHF-UHF調諧器的下變頻轉換器) |
| μPC2776TB | 5 V, Minicold Silicon MMIC Medium Output Power Amplifier(中等輸出功率放大器) |
| μPC2776T | Wideband, Medium Output Amplifier.(寬帶、中等輸出放大器集成電路) |
| μPD23C24020 | 24M-Bit Mask Programmable ROM(24M位掩膜可選ROM) |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| PC27B | 制造商:Datak Corporation 功能描述: |
| PC28 | 制造商:Datak Corporation 功能描述: 制造商:Datak Corporation 功能描述:Res POT 1M Ohm 20% 1/2W 1Turn 4mm (50.5 X 24mm) Solder Lug Panel Mount |
| PC-280-16210 | 制造商:JAMECO RELIAPRO 功能描述:DC MOTOR , 6VDC , 9800MA |
| PC-28-160 | 功能描述:XFRMR PWR 115V 28VCT 160MA RoHS:是 類別:變壓器 >> 功率 系列:PC 標準包裝:1 系列:260 類型:標準 最大功率:65 VA 主線圈:雙 副線圈:三路，中心抽頭 在某電流時的串聯(lián)輸出電壓:500 VAC @ 85mA，5 VAC @ 2A，6.3 VAC @ 2A 在某電流時的并聯(lián)輸出電壓:- 安裝類型:底座安裝 尺寸/尺寸:102.36mm L x 67.31mm W 高度 - 座高（最大）:66.80mm 端接類型:導線引線 |
| PC28-160 | 制造商:SUPERWORLD 制造商全稱:Superworld Electronics 功能描述:POWER TRANSFORMER |
發(fā)布緊急采購，3分鐘左右您將得到回復。