315 remote control circuit

Published:2011/6/9 8:22:00 Author:Lena | Keyword: remote control, circuit | From:SeekIC

Early transmitters more usually use LC oscillator, but frequency excursion is more graveness. The appearance of sound-surface device solve the problem, the frequency stability is general same as crystal oscillator, but the base frequency can be hundreds of even thousands of MHz. Dispense with multiple frequency, this circuit is more simple than crystal oscillator circuit. These two are common transmitter circuits, because of using sound-surface device, these circuits work very stable. Even if hand antenna, sound-surface or other part, transmit frequency will not excursion.



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