W91030 Ver la hoja de datos (PDF) - Winbond

Número de pieza

componentes Descripción

Fabricante

W91030

CALLING LINE IDENTIFIER

Winbond 

Preliminary W91030B

capacitor charging from VDD to VSS (the ALGRC pin charges from VDD to VSS through a resistor). The

capacitor will charge rapidly via a charge switch after ALGO returns low. To obtain unequal present

and absent guard times, a diode can be connected as shown in Figure 7-6, to give the unequal

resistance required during capacitor charging and discharging.

Dual tone detected

W91030B

Capacitor

Charge/Discharge

Control Circuit

+

-

Comparator

V CPth

VDD

Discharge

Switch

ALGRC

VDD

C

R

Charge

Switch

ALGR

ALGO

Figure 7-4. Guard Time Circuit of Dual Tone Alert Signal Detection

Tip/Ring

ALGR

ALGRC

ALGO

Discharge

Switch

Charge

Switch

Alerting Signal

t DP

t GP

VCPth

t REC

ON

ON

t DA

t GA

V CPth

t ABS

ON

Figure 7-5. Guard Time Waveform of ALGR, ALGRC and ALGO pins

-8-

Share Link: