TDA5634T Datasheet, PDF (7/20 Pages) NXP Semiconductors – 9 V UHF mixer/oscillator for TV and VCR tuners

Philips Semiconductors
9 V UHF mixer/oscillator for TV and VCR
tuners
Product specification
TDA5634T
signal
handbook, full pagewidth_{50 Ω source}
e
Vmeas _V
50 Ω
50 Ω
RMS
voltmeter
AC
HYBRID
BD
CIN1 IFOUT1
Vi _D.U.T.
CIN2 IFOUT2
TR
Vo
2x5
turns
2 ^V'meas
turns
N1/N2 = 5
spectrum
analyzer
50 Ω
MBH048
Loss of the hybrid: 1 dB.
V_i = V_meas − loss of the hybrid.
V_o = V’_meas + 15.4 dB (transformer ratio N1/N2 = 5 and transformer loss).
G_v = 20 log -VV----^o-_i = 20 log ^V-V----,m-^m----_ee--_a-^a--_s-^s- + 15.4 dB + loss of the hybrid.
Fig.3 Gain measurement in band C.
handbook, full pagewidth
NOISE
SOURCE
AC
HYBRID
50 Ω
BD
CIN1 IFOUT1
D.U.T.
CIN2 IFOUT2
TR
NOISE
METER
2x5
turns
2
turns
N1/N2 = 5
MBH049
Loss of the hybrid: 1 dB.
NF = NF_meas − loss of the hybrid.
1996 Nov 7
Fig.4 Noise figure measurement in band C.
7