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參數(shù)資料
| 型號： | MC13155D |
| 廠商： | MOTOROLA INC |
| 元件分類： | 通信及網(wǎng)絡 |
| 英文描述： | WIDEBAND FM IF |
| 中文描述： | SPECIALTY TELECOM CIRCUIT, PDSO16 |
| 封裝： | PLASTIC, SO-16 |
| 文件頁數(shù)： | 3/16頁 |
| 文件大?。?/td> | 267K |
| 代理商： | MC13155D |
MC13155
3
MOTOROLA ANALOG IC DEVICE DATA
CIRCUIT DESCRIPTION
The MC13155 consists of a wideband three–stage limiting
amplifier, a wideband quadrature detector which may be
operated up to 200 MHz, and a received signal strength
indicator (RSSI) circuit which provides a current output
linearly proportional to the IF input signal level for
approximately 35 dB range of input level.
+
10
μ
Figure 2. Test Circuit
Limiter 2
Output
Limiter 1
Output
Video
Output
Vin
330
1.0n
49.9
1.0n
27
1.0k
100n
330
L1 – Coilcraft part number 146–09J08S
L1
260n
20p
499
VEE
VEE
VEE
+
10n
1.0n
1.0n
1.0n
1.0n
100n
1.0n
IN2
DEC2
VEE1
RSSI
Buffer
RSSI
VEE2
LIMO2
QUAD2
QUAD1
LIMO1
VCC2
DETO2
DETO1
VCC1
DEC1
IN1
9
10
11
12
13
14
15
16
8
7
6
5
4
3
2
1
10
μ
APPLICATIONS INFORMATION
Evaluation PC Board
The evaluation PCB shown in Figures 19 and 20 is very
versatile and is designed to cascade two ICs. The center
section of the board provides an area for attaching all surface
mount components to the circuit side and radial leaded
components to the component ground side of the PCB (see
Figures 17 and 18). Additionally, the peripheral area
surrounding the RF core provides pads to add supporting
and interface circuitry as a particular application dictates.
This evaluation board will be discussed and referenced in
this section.
Limiting Amplifier
Differential input and output ports interfacing the three
stage limiting amplifier provide a differential power gain of
typically 46 dB and useable frequency range of 300 MHz.
The IF gain flatness may be controlled by decoupling of the
internal feedback network at Pins 2 and 15.
Scattering parameter (S–parameter) characterization of
the IF as a two port linear amplifier is useful to implement
maximum stable power gain, input matching, and stability
over a desired bandpass response and to ensure stable
operation outside the bandpass as well. The MC13155 is
unconditionally stable over most of its useful operating
frequency range; however, it can be made unconditionally
stable over its entire operating range with the proper
decoupling of Pins 2 and 15. Relatively small decoupling
capacitors of about 100 pF have a significant effect on the
wideband response and stability. This is shown in the
scattering parameter tables where S–parameters are shown
for various values of C2 and C15 and at VEE of – 3.0 and
– 5.0 Vdc.
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