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參數(shù)資料
| 型號(hào)： | MC13030 |
| 廠商： | Motorola, Inc. |
| 英文描述： | DUAL CONVERSION AM RECEIVER |
| 中文描述： | 二次變頻接收機(jī)上午 |
| 文件頁(yè)數(shù)： | 7/16頁(yè) |
| 文件大?。?/td> | 386K |
| 代理商： | MC13030 |
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MC13030
7
MOTOROLA ANALOG IC DEVICE DATA
PIN FUNCTION DESCRIPTION (continued)
Pin No.
Description
Internal Equivalent Circuit
10
IF
10
10 k
SD
510
Station Detector IF Output
This output is “on” when V11 > V8. The output is an amplified and limited
2nd IF signal. The signal level is
≈
250 mVpp when it is 100% “on”.
11
11
510
1.0 k
1.0 k
VCC
S Level Output
This is a dc current proportional to IF input level. With a load resistor of
75 k, the dc voltage is 0 to 5.1 V.
12
12
1.0 k
VCC
IF AGC In
The IF gain is controlled by the dc voltage on this pin. It is normally
connected to Pin 13 through an RC network to filter out the audio signal
on Pin 13. The IF gain is maximum when V13
≈
3.6 V. When V13
increases, the IF gain decreases.
13
100
13
VCC
Audio Output
The dc voltage on Pin 13 is
≈
3.6 V with no input signal and increases to
≈
4.5 V at minimum IF gain. A nonpolarized electrolytic capacitor may be
required to couple to the audio circuits if the audio amplifier dc bias
voltage is between these voltages.
14
VCC
14
Supply Voltage
The nominal operating voltage is 8.0 V.
15
510
510
510
15
IF Amplifier Output and Detector Input
The detector coil must be connected between Pin 15 and 16. The IF
amplifier output is a current source, the IF amplifier is a transconductance
amplifier; the gain is determined by the impedance between Pins 15 and
16. The IF amplifier gm
≈
0.028 mho. If a wide bandwidth IF is desired, the
detector coil can be connected between Pins 15 and 16 without a tap and
then loaded with a resistor across the coil.
16
16
1.0 k
510
Detector Reference Voltage
One side of the detector coil is connected to this pin. It should be
bypassed with a 0.1
μ
F capacitor.
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