MC1648

MOTOROLA

HIPERCOMM

BR1334 — Rev 4

8

Figure 12. Circuit Used for Collector Output Operation

10

12

0.1

µF

3

5

Bias Point

L2*

Tank

C2

1.0

µF

VCC2

14

1VCC1

C1

L1

+5.0V

C3

R

0.01

µF

+9.0V

AGC

+5.0V

1.0

µF

1.2k

8VEE2

7VEE1

* QL ≥ 100

Output

Figure 13. Power Output versus Collector Load

Figure 14. Power Output versus Collector Load

TOTAL COLLECTOR LOAD (OHMS)

7

10

TOTAL COLLECTOR LOAD (OHMS)

0

10,000

6

5

4

3

2

1

100

1000

10

10,000

100

1000

14

0

12

10

8

6

4

2

See test circuit, Figure 12, f = 100MHz

C3 = 3.0–35pF

Collector Tank

L1 = 0.22

µH

C1 = 1.0–7.0pF

R = 50

Ω–10kΩ

RP of L1 and C1 = 11kΩ @ 100MHz Resonance

Oscillator Tank

L2 = 4 turns #20 AWG 3/16” ID

C2 = 1.0–7.0pF

See test circuit, Figure 12, f = 10MHz

C3 = 470pF

Collector Tank

L1 = 2.7

µH

C1 = 24–200pF

R = 50

Ω–10kΩ

RP of L1 and C1 = 6.8kΩ @ 10MHz Resonance

Oscillator Tank

L2 = 2.7

µH

C2 = 16–150pF