U4454B Datasheet, PDF (4/7 Pages) TEMIC Semiconductors – Quasi-Split-Sound Processing and AM-Demodulator

U4454B
Parameters
Test Conditions / Pins Symbol Min.
Typ.
Max.
Unit
ÁÁÁÁÁÁÁÁÁÁÁ^ADOATSR_{ÁÁÁÁÁÁÁÁÁÁÁ}^{oiiMCuFgpttanppoolam}_lÁÁ^{uÁÁÁÁÁÁÁÁÁuuelhtttoaptrproredueu}_{ÁÁÁÁÁÁÁÁÁÁÁ}^mjste_ntei^{:voocvsoitnto}_{ÁÁÁÁÁÁs}^{ÁÁÁÁÁailiolentctanacrdggea}_{ÁÁÁÁÁÁÁÁÁÁÁ}^ieetsitoo_{ÁÁÁÁÁÁÁÁÁÁÁ}^rtion_{ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ}^{fVmfRmfPf2mmmm}_2ÁÁi^{ÁÁÁÁÁÁÁÁÁ}_e⁵_n^{oooo==fkdddd=e1H85r====}_ÁÁ5^{ÁÁÁÁÁÁÁÁÁ4e04z/n.4111%%P5lc02iokk}_ÁÁe^{ÁÁÁÁÁÁÁÁÁVn.wH:5HH,7zvzzkP}_{pÁÁÁÁÁÁÁÁÁÁÁ}ⁱ_Haⁱⁿⁿ_sz=s⁶_ÁÁ^{0ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁVTVRSoH/Do,}_N^Au_{ÁÁÁÁÁÁÁÁÁÁÁ}^DCtF ÁÁÁÁÁÁÁÁÁÁÁ^see_{ÁÁÁÁÁÁÁÁÁÁÁ}^n4o2t0_{ÁÁÁÁÁÁÁÁÁÁÁ}^{e 4} ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ^54626.5820_{ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ}^1730500_{ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ}^m_{ÁÁÁÁÁÁÁÁÁÁÁ}^Vdd%WVR_BB^M_{ÁÁÁÁÁÁÁÁÁÁÁ}^S _{ÁÁÁÁÁÁÁÁÁÁÁ}
Notes
1. When soldered to PCB
W 2. With: VCO-capacitor: CVCO = 22 pF;
Loop filter: R₁ = 150 , C₁ = 470 nF, C₂ = 1.5 nF
3. Picture carrier PC = 38.9 MHz; sound carrier
SC₁ = 33.4 MHz, SC₂ = 33.16 MHz; PC/SC₁ = 13 dB;
PC/SC₂ = 20 dB; PC unmodulated (equivalent to
sync peak level
4. Sound carrier SC = 32.4 MHz, modulated with
f_mod = 1 kHz, m = 54%, V_in = 10 mV
Alignment of the VCO
1. Apply 4.5 V to Pin 5, to disable the broadband
amplifier.
2. Measure the dc-voltage at Pin 11 (phase detector).
3. Apply a 38.9 MHz unmodulated carrier signal to the
IF input (Pins 1–16); adjust the input level so that the
AGC voltage at Pin 5 is between 2.5 V and 3.3 V.
4. Adjust the VCO circuit until Pin 11 has the same
dc-voltage as measured in step 2.
5. Step 1–4 is a coarse alignment but sufficient for AM-
mode. For sound optimum in FM-mode adjust for the
minimum buzz at critical test pattern (grid pattern) in
the second sound channel.
4 (7)
TELEFUNKEN Semiconductors
Preliminary Information
Rev. A1, 23-Feb-96