10V

100pF

0.1 F

m

INPUT

0.22 F

m

DC

BIAS

10k

OUTPUT

10k

270pF

1N914

1:1

1mH

1mH

(SEENOTE)

Frequency-Hertz

10

100

1k

10k

100k

1M

0

10

20

30

40

50

60

70

80

180

135

90

45

0

V =10V

O

f=1Mhz

T =25 C

IN

SC

J

°

Note: TransformerData:N1=N2=20 TAWG26

Core=Ferroxcube3E2A Ferrite,0.5” O.D. Toroid

CarrierFrequency=1Mhz

PHASE

GAIN

Temperature - C

°

3.4

3.2

3.0

2.8

2.6

2.4

2.2

2.0

1.8

1.6

-55 -35 -15 5 25 45 65 85 105 125

V

=10V

R =10k

T =25 C

IN

T

J

W

°

C Value-Picofarads

T

10

3

10

4

10

5

10

6

10

7

10

8

10

5

10

4

10

3

10

2

10

1

fosc=1.27

R C

T

T

UC2901-EP

SLUS709A – DECEMBER 2006 – REVISED MARCH 2010

www.ti.com

Figure 1. Transformer-Coupled Open-Loop Transfer Function

Figure 3. Typical Driver Output Swing vs

Temperature

Figure 2. Oscillator Frequency

4

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