mc13176d ETC-unknow, mc13176d Datasheet - Page 15

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mc13176d

Manufacturer Part Number
mc13176d
Description
Fm/am Transmitter
Manufacturer
ETC-unknow
Datasheet

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point is selected as a tradeoff between average power output
and quality of the AM.
a static DC offset of 1.04 Vdc, the circuit shown in Figure 29
completes the design. Figures 30, 31 and 32 show the results
of – 6.9 dBm output power and 100% modulation by the 10
kHz and 1.0 MHz modulating sinewave signals. The
amplitude of the input signals is approximately 800 mVp–p.
standard value resistor of 3.9 k.
MOTOROLA RF/IF DEVICE DATA
In the design example, shown in Figure 29, the operating
For V CC = 3.0 Vdc; l CC = 18.5 mA and I mod = 0.5 mAdc and
Where R mod = (V CC – 1.04 Vdc)/0.5 mA = 3.92 k, use a
Figure 31. Input Signal and AM Modulated
Carrier for f mod = 10 kHz
Figure 30. Power Output of Unmodulated Carrier
MC13175 MC13176
Figure 32. Input Signal and AM Modulated
Input
Data
V CC
800mVp–p
Figure 29. Analog AM Transmitter
3.0Vdc
Carrier for f mod = 1.0 MHz
R mod
3.9k
6.8
1.04Vdc
+
560
0.8Vdc
16
15