Monolithic discriminator dual

QD21.4-4000/01

Application

Limiting values

Unit

Value

Center frequency

fo

MHz

21.4

Peak separarion

kHz

± 20

Sym. resonance frequency

fs at 25

°C

MHz

21.38

± 600 Hz

Asym. resonance frequency

fa at 25

°C

MHz

21.42

± 1200 Hz

Change of sy. resonance

frequency

-40...+80

°C

ppm

< 30

Dynamical capacity C1

fF

~ 3.9

Terminating impedance Z

Test circuit

R1 || C1

Ohm/pF

12.5

R2 || C2

Ohm/pF

12.5

Operating temp. range

° C

-40...+80

2 pol resonator

discriminator

use in mobile and

stationary transceivers

Characterstics

QD10.7-2800/01

Application circuits

R1 = 2.4 k

R2 = 2.4 k

L1; L2 = 5

µH

C1; C2 = 0.8...10 pF

R1 = 0

R2 = 3.3 k

L1; L2 = 5

µH

C1; C2 = 0.8...10 pF

TELE FILTER Zweigniederlassung der DOVER Germany GMBH

30.01.03

Potsdamer Str. 18 D- 14513 Teltow

(+49)03328-4784-10 ; Fax (+49)03328-4784-30 http:\\www.vectron.com