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PT4450 RF Transmitter Technical Overview by mhemara is a document available to read on EtoBox.

What is PT4450 RF Transmitter Technical Overview about?

The circuit uses a PT4450 chip that includes a SAW oscillator operating at 434MHz. The chip measures temperature and humidity data using a TM8712 MCU, codes the data, and transfers it to the PT4450 chip. The PT4450 modulates the coded data onto the 434MHz signal using ON-OFF keying modulation by turning the oscillator on and off. Components L4, C8, L3, C7, L2 and C2 form an antenna matching network.

Author

mhemara

Language

EN