LM909 Typical application circuit diagram

Published:2011/8/31 22:56:00 Author:Ecco | Keyword: Typical application | From:SeekIC

The performance of transmission circuit required by remote control receiver circuit is shown in circuit as follow: indicators need to launch as follows: f RF = 27MHZ, f audio = 5.5KHZ, 100% modulation - square wave; f audio =± 600HZ, frequency shift keying (FSK) is 160HZ, duty cycle is 100 %, 60% or 30%. T1 primary is 10T, secondary is 4T; T2 primary is 12T, secondary is 2T; it uses 5mm framework.



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