High-Dynamic-Range, Direct Up-/Downconversion

750MHz to 1200MHz Quadrature Mod/Demod

12

______________________________________________________________________________________

LO FREQ

(MHz)

RF FREQ

(MHz)

R1

(

Ω

Ω

Ω

Ω)

R2

(

Ω

Ω

Ω

Ω)

R3

(

Ω

Ω

Ω

Ω)

(mA)

CONVERSION

LOSS (dB)

IIP3

(dBm)

57MHz IIP2

(dBm)

420

620

330

269

9.8

33.85

62.1

453

665

360

254

9.83

33.98

62.9

499

698

402

230

9.81

32.2

66.6

549

806

464

207

9.84

31.1

66.86

800

771

650

1000

550

173

9.95

29.87

65.25

420

620

330

269

9.21

33.1

68

453

665

360

254

9.25

33.9

66.87

499

698

402

230

9.36

34.77

66.7

549

806

464

207

9.39

35.3

66.6

900

871

650

1000

550

173

9.46

32

64.64

420

620

330

269

9.47

34.9

> 77.7

453

665

360

254

9.5

35.4

> 77.5

499

698

402

230

9.53

34.58

> 76.5

549

806

464

207

9.5

33.15

> 76.5

1000

971

650

1000

550

173

9.61

31.5

76

Table 2. Typical Performance Trade-Offs as a Function of Current Draw—Demodulator Mode

IF1 = 28MHz, IF2 = 29MHz.