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TDA5636B Datasheet, PDF (11/28 Pages) NXP Semiconductors – 9 V VHF hyperband and UHF mixer/oscillator for TV and VCR 3-band tuners
Philips Semiconductors
9 V VHF hyperband and UHF mixer/oscillator for
TV and VCR 3-band tuners
Product specification
TDA5636B; TDA5637B
handbook, full pagewidth
signal
50 Ω source
e
V meas V
RFA
IF
out
50 Ω Vi
D.U.T.
RMS
voltmeter
GND
IF
out
TR
27 Ω
Vo
2x5
turns
2 V'meas
turns
N1/N2 = 5
spectrum
analyzer
50 Ω
MGC507
Zi (AIN) >> 50 Ω ⇒ Vi = 2 × Vmeas.
Vi = Vmeas + 6 dB.
Vo = V’meas ×


5----0---5--+-0----2---7--
+
15.4 dB (transformer ratio N1/N2 = 5 and transformer loss).
Gv = 20 log -VV----o-i
Fig.4 Band A gain measurement.
handbook, full pagewidth
BNC C1
L1
I1
PCB
plug
C2
RIM-RIM
(a)
I3
PCB
BNC C3
I2
plug
RIM-RIM
C4
(b)
MBE286 - 1
(a) For fRF = 50 MHz:
mixer A frequency response measured = 57 MHz, loss = 0 dB
image suppression = 16 dB
C1 = 9 pF
C2 = 15 pF
L1 = 7 turns (diameter = 5.5 mm, wire diameter = 0.5 mm)
l1 = semi rigid cable (RIM): 5 cm long
(semi rigid cable (RIM); 33 dB/100 m; 50 Ω; 96 pF/m).
(b) For fRF = 150 MHz:
mixer A frequency response measured = 150.3 MHz, loss = 1.3 dB
image suppression = 13 dB
C3 = 5 pF
C4 = 25 pF
l2 = semi rigid cable (RIM): 30 cm long
l3 = semi rigid cable (RIM): 5 cm long
(semi rigid cable (RIM); 33 dB/100 m; 50 Ω; 96 pF/m).
Fig.5 Input circuit for optimum noise figure in band A.
1996 Dec 02
11