Created
October 19, 2018 13:15
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Si44xx Class E matching (Jupyter notebook)
4FSK symbol mapping and preamble requirements (FLEX)
Si4x6x errata re. 4FSK
4FSK sync word
Ins and outs of non-standard preamble detection
Si446x DSA notes -- Digital Signal Arrival detector, see https://www.silabs.com/documents/public/data-sheets/Si4468-7.pdf
Unknowns for Class-E matching: the relationship between PA_PWR_LVL and switcher loss/resistance
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Useful references:
Matching network design (SiLabs knowledge base)
What is the Si4432 PA output impedance?
What are the advantages and disadvantages of switched current mode?
Class-E power vs. RDC
External PA Matching
RSSI squelching (limiting RX sensitivity)
And some about the chip:
Si4463 patch and startup delay
Alternative power amps:
Maxim MAX2601/MAX2602 (Can't find any S-parameter files)
-- MAX2602 match data for 120MHz
NXP -- ADS data but no S-params
Infineon -- S-param data available, can use with RFSim99
Dev boards:
Si4461 RF Pico Board