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參數(shù)資料
| 型號： | G12290EJ2V0AN00 |
| 英文描述： | uPC1663 DC to VHF Wideband Differential Input and Output Amplifier IC |
| 中文描述： | uPC1663直流高頻寬帶差分輸入和輸出功放IC |
| 文件頁數(shù)： | 7/23頁 |
| 文件大?。?/td> | 165K |
| 代理商： | G12290EJ2V0AN00 |
7
1. GENERAL
The
P
PC1663 is a differential input, differential output wideband amplifier IC that uses a high-frequency (f
T
= 6
GHz) silicon bipolar process (called NESAT 1). This process improves bandwidth, phase characteristics, input
noise voltage characteristics, and low power consumption compared to conventional HF-band differential amplifier
ICs.
These features make this device suitable as a wideband amplifier in high-definition TVs, high-resolution monitors,
broadcasting satellite receivers, and video cameras, as a sense amplifier in high-density CCD and optical pick-up
products, or as a pulse amplifier for optical data links.
Note, however, that this device's wide frequency range means that extra caution is required with regard to factors
such as oscillation.
This application note describes how to use the
P
PC1663 and its application circuits.
2. BASIC OPERATIONS
2.1 Outline of Operations
Figure 1. Internal Equivalent Circuit
Q
1
Q
2
Q
8
Q
9
Q
6
Q
5
Q
3
Q
4
Q
10
Q
11
R
4
R
3
R
6
R
7
R
9
R
13
R
17
R
19
R
18
OUT
1
OUT
2
R
16
R
1
R
2
R
3
R
4
R
5
R
6
R
7
R
8
R
9
R
10
2.4 k
2.4 k
50
50
590
590
600
10 k
1.4 k
1.1 k
R
11
R
12
R
13
R
14
R
15
R
16
R
17
R
18
R
19
1.1 k
750
300
7 k
7 k
1.2 k
400
1.2 k
400
R
12
R
15
R
14
R
11
R
10
R
8
R
2
R
1
R
5
IN
2
IN
1
G
1B
G
1A
(G
2A
)
Note
V
CC–
V
CC+
Note:
The PC1664, which included G
2A
and G
2B
pins,
has been discontinued.
(G
2B
)
Figure 1 shows an internal equivalent circuit diagram of the
P
PC1663. It is a DC direct-coupled amplifier in which
two emitter-followers for transistors Q
5
and Q
6
are added to the two-stage differential configuration and in which
feedback is propagated from the output via R
14
and R
15
.
Since OUT
1
and OUT
2
are differential outputs, the output voltage changes to the reverse direction at precisely
double the gain (single-end) of differential voltage
'
V
DIF
added between the differential inputs IN
1
and IN
2
. OUT
1
operates in phase with IN
1
and OUT
2
operates in phase with IN
2
, so that, for example:
When IN
1
>
IN
2
, OUT
1
changes to positive and OUT
2
changes to negative
When IN
1
<
IN
2
, OUT
1
changes to negative and OUT
2
changes to positive
Accordingly, as is shown in Figure 2, if a sine wave is input to IN
1
when IN
2
is used as a ground, a sine wave
having the same phase as the IN
1
input is output via OUT
1
and a sine wave having a 180
q
inverted phase is output
via OUT
2
.
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