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Page 7 of 11

Issue 0

LANSDALE Semiconductor, Inc.

ML13135

Figure 15. PLL Controlled Narrowband FM Receiver at 46/49 MHz

Figure 16. 144 MHz Single Channel Application Circuit

24

0.2

µH

RF

Input

62 pF

0.001

23

22

21

20

19

18

150 pF

0.01

0.1

360

Ceramic

Filter

10.7 MHz

455 kHz

Quad Coil

68 k

0.15

1.0 k

17

16

15

14

13

12

0.1

500 p

3

2

1

4

5

6

7

8

9

10

11

0.1

0.1

Ceramic

Filter

455 kHz

10.245

MHz Xtal

27 p

5.0 p

50 p

5.1 k

120 p

0.1

VCC

47 k

0.68

µH

AF

VCC2

2nd LO

VCC1

1st LO

Varicap

Limiter

Demod

Recovered

Audio

RSSI

Output

10 k

500 p

100 k

1.0

0.01

Fin1

0.1

0.1

2.7 k

ML145168

3.0 p

MPS5179

0.05

µH

0.07

µH

39 p

1.0

µ

5.1 k

L3

12 p

3300 p

To Mixer

15 k

3300 p

470 p

470

L2

RF Input

12 p

Q1

1st LO

External Oscillator Circuit

L1

X1

43 p

68 p

5.6 k

1.0 k

100 p

15 k

0.82

µ

1.0

µF

15 p

VCC

1000p

Q1

470

MPS5179

44.585 MHz 3rd Overtone

Series Resonant Crystal

0.078

µH Inductor

(Coilcraft Part # 146–02J08)

fosc =

133.755 MHz

1.0

µF

VCC

OSC

Out

OSC

In

PD1

PD2

LD

D3

Fin2

VDD

D0

D1

D2

ML13135

Q1 –

L2 –

L3 –

Q1 –

X1 –

L1 –

VSS

+

+