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參數(shù)資料
| 型號： | P11976EJ2V0AN00 |
| 英文描述： | uPC2711-15. uPC2745-49. uPC2791/92. uPC3210 6-Pin Mini-Mold. 6-Pin Super Mini-Mold Silicon High-Frequency Wideband Amplifier MMIC |
| 中文描述： | uPC2711 - 15。 uPC2745 - 49。 uPC2791/92。 uPC3210 6引腳小型模具。 6引腳超小型模具硅高頻寬帶放大器單片 |
| 文件頁數(shù)： | 10/31頁 |
| 文件大?。?/td> | 174K |
| 代理商： | P11976EJ2V0AN00 |
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Application Note P11976EJ2V0AN00
10
3.
THEORETICAL DESCRIPTION
3.1 Description of Internal Circuits
Products in this series incorporate 50-
matching circuits based on the resistance at the IC’s input and output
stages. A two-stage configuration is employed to obtain the desired RF characteristics. This enables the IC with 50-
connections in a wide operating frequency range. The details of the internal circuit configurations differ according
to each circuit’s characteristics. An internal equivalent circuit is shown in Figure 3-1.
The respective internal circuits are described below in the order of their development.
Internal circuits of products in the
μ
PC2711 to 2713 Series feature a wide band with peaking capacitance inserted
at the emitter side of each stage, and multiple negative feedback circuits to suppress performance deviation in the
high frequency region. A Darlington-type output stage greatly increases the feedback loop gain. See the
Application Note General-Purpose High-Frequency Wideband Amplifiers
μ
PC1675G,
μ
PC1676G,
μ
PC1688G
(P10964E)
.
By contrast, the
μ
PC2714’s output stage transistor is not a Darlington type but is instead a single-unit type for low
power consumption. The
μ
PC2715 has peaking capacitance at the input stage only and carries gain in the VHF
band.
The
μ
PC2745/46 have simple two-stage configurations without negative feedback, which makes for lower voltage
and can accommodate a wide band by inserting peaking capacitance at the emitter side of each stage.
The
μ
PC2747/48 have peaking capacitance at the output stage only and carry gain in the UHF band.
The
μ
PC2749 uses a Darlington-type output stage and carries gain in the L band due to its negative feedback
circuit toward the base for input.
The
μ
PC2791/92 use multiple negative feedback and a Darlington-type output stage. The
μ
PC2791 has peaking
capacitance inserted at the output stage emitter side to increase the bandwidth and the
μ
PC2792 carries gain in the
VHF-band without inserting peaking capacitance.
The
μ
PC3210 uses a Darlington-type output stage and carries gain due to its negative feedback circuit toward the
base for input, and obtains a wide band characteristic by inserting peaking capacitance at the emitter side.
The circuit GND characteristics of these devices can be improved by using several GND pins.
Note that for these products it is not possible to externally change the feedback or internal bias of the IC’s internal
circuitry.
Figure 3-1. Internal Equivalent Circuits of High-Frequency Wideband Amplifier ICs (1/2)
μ
PC2711 to 2713
μ
PC2714/15
IN 1
6
4
3
GND
GND
2
5
V
CC
OUT
IN 1
6
4
3
GND
GND
2
5
V
CC
OUT
*
The above diagram is for the
μ
PC2714. The capacitor marked
with an asterisk does not exist in the
μ
PC2715.
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| P11997EJ2V0AN00 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:uPC2757. uPC2758. and uPC8112. 3-V Power Supply. 1.9-GHz Frequency Down-converter ICs for Mobile Communication |
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