TDA1579/V5 Ver la hoja de datos (PDF) - Philips Electronics

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TDA1579/V5

Decoder for traffic warning (VWF) radio transmissions

Philips Electronics 

Philips Semiconductors

Decoder for traffic warning (VWF) radio

transmissions

FILTER INFORMATION

Gain

Amplifier conditions: Go >> Gv and Go >> 2 ⋅ Q2

Gv = –-p---2----+-----p----R---------3--C--------⋅--1----C-----+-----1----C------⋅----2--C---------2-R----------+-1--------p--R-⋅---------C---1------------1---⋅-------R----------2R----------⋅1-----R-----+----3------R----⋅-----2-C----------1----------⋅------C--------2------ , in which p = jω and Gv = V-V----o-i .

Product specification

TDA1579

TDA1579T

Resonance frequency

GENERAL EQUATION

ωr =

-------------------------------1---------------------------------

R-R----1-1----+-⋅---R-R----2-2-- ⋅ R3 ⋅ C1 ⋅ C2

C1 = C2 = C

---------------------1----------------------

C R-R----1-1----+-⋅---R-R----2-2-- ⋅ R3

Gain at ω = ωr

Quality

−Gvr = C-----1---C--+--2---C-----2-- ⋅ RR-----31--

12-- ⋅ RR-----31--

Q=

--C---C-1---1--+---⋅--C-C----2-2-- ⋅ R-----3----R-(---R-1---1--⋅---R+----2-R-----2---)--

12-- -R----3----R-(---R-1---1--⋅---R+----2-R-----2---)--

Recommended components

C1, C2

and

R1, R2, R3

or

C1, C2

and

R1, R2, R3

metallized polycarbonate film (MKC) capacitors; ± 5%

metal film (MR) resistors; ± 2%

metallized polyester film (MKT) capacitors; ± 5%

carbon film (CR) resistors; ± 2%

C1 = C2 = C

R2 < < R1

--------------1---------------

C R2 ⋅ R3

12-- ⋅ RR-----31--

12-- ⋅ RR-----32--

May 1992

9

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