TDA6404 Datasheet, PDF (15/32 Pages) NXP Semiconductors – 5 V mixer/oscillator-PLL synthesizers for hyperband tuners

Philips Semiconductors
5 V mixer/oscillator-PLL synthesizers for
hyperband tuners
TEST AND APPLICATION INFORMATION
Product specification
TDA6404; TDA6405;
TDA6405A
handbook, full pagewidth
signal
50 Ω source
VHFIN IFOUT1
e
Vmeas V
50 Ω
Vi
D.U.T.
Vo
IFOUT2
RMS
voltmeter
T
(1)
N1
C
(2)
N2
V'meas
spectrum
analyzer
50 Ω
MGK828
(1) N1 is 2 × 5 turns
(2) N2 is 2 turns
Z_i >> 50 Ω ⇒ V_i = 2 × V_meas; V_i = 80 dBµV
V_o = V’_meas + 16 dB (transformer ratio ^NN-----12-- = 5 and transformer loss)
G_v = 20 log -VV----^o-_i
Fig.4 Voltage gain (G_v) measurement in the VHF band.
signal
handbook, full pagew₅id₀th_{Ω source}
A
C
e
Vmeas V
50 Ω ^{Vi HYBRID}
RMS ^{50 Ω}
voltmeter
B
D
UHFIN1 IFOUT1
D.U.T.
Vo
UHFIN2 IFOUT2
T
(1)
N1
C
(2)
N2
V'meas
spectrum
analyzer
50 Ω
MGK829
(1) N1 is 2 × 5 turns
(2) N2 is 2 turns
V_i = V_meas; V_i = 70 dBµV
V_o = V’_meas + 16 dB (transformer ratio ^NN-----12-- = 5 and transformer loss)
G_v = 20 log -VV----^o-_i + 1 dB (1 dB = correction for hybrid loss)
Fig.5 Voltage gain (G_v) measurement in the UHF band.
1999 Jan 13
15