U2305B Datasheet, PDF (6/8 Pages) TEMIC Semiconductors – VHF/ UHF-Tuner-IC

U2305B
Input Impedance Mixer Band A (S11A), B and C (S11B/C)
j
0.5j
2j
0.2j
0
1045 MHz
ÁÁÁÁÁÁ ^{845 MHz}
2
645 MHz
ÁÁÁÁÁÁ _{445 MHz}
ÁÁÁÁ _{245 MHz}
ÁÁÁÁÁÁÁÁÁÁ ÁÁ ^45MHz
ÁÁÁÁÁÁÁ ÁÁ ^0.2
0.5
1
ÁÁ₂
5j
ÁÁ_{5 ÁÁ2ÁÁ50MÁÁÁÁH45z1MÁÁÁÁHzÁÁ}
–0.2j
ÁÁÁÁ ^{500 MHz –5j}
ÁÁÁÁ ^{1 750 MHz}
95 9928
–0.5j
–2j
Z₀ = 50 W
–j
Figure 4. Input impedance mixer band A (S11A), B and C (S11B/C)
1) _VHF-low
W Normalised to 50 , measuring range 45 MHz to 750 MHz.
2) _{VHF-high and UHF}
W Normalised to 50 , measuring range 45 MHz to 1045 MHz. Both inputs are driven symmetrical.
W W The output impedance of hybrid is 100 ,the measured levels are then calculated in reference to 50 .
6 (8)
TELEFUNKEN Semiconductors
Preliminary Information
Rev. A1, 10-Sep-96