U2320B Datasheet, PDF (5/7 Pages) TEMIC Semiconductors – VHF/UHF Tuner-IC

Input Impedance Mixer Band A (S11A) and B (S11B)
j
0.5j
U2320B
2j
0.2j
0
1045 MHz
ÁÁÁÁÁÁÁ ^{845 MHz}
1)
645 MHz
ÁÁÁÁÁÁ 445 MHz
ÁÁÁÁ _{245 MHz}
ÁÁÁÁ _{45 MHz}
ÁÁÁÁÁÁÁÁÁÁÁ ÁÁ _0.2
0.5
1
ÁÁ₂
5j
ÁÁ₅
ÁÁÁ 1
45 MHz
–0.2j
ÁÁÁÁ _{250 MHz}
ÁÁÁÁÁÁÁÁÁÁÁÁ _{500MHz –5j}
ÁÁÁ ^{2) 750 MHz}
95 9928
–0.5j
–2j
Z₀ = 50 W
–j
Figure 4. Input impedance mixer band A (S11A), and B (S11B)
1) VHF-Low
W Normalized to 50 , measuring range 45 MHz to 750 MHz.
2)
VHF-High and UHF
W Normalized to 50 , measuring range 45 MHz to 1045 MHz. Both inputs are driven symmetrical.
W The output impedance of the hybrid is 100 , the measured levels are then calculated in reference
W to 50 .
TELEFUNKEN Semiconductors
5 (7)
Rev. A1, 29-May-96