classeampdesignrevb (1).xls

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2	Class E Power Amp Design Using NMØS Equations Presented at FDIM 2009
3								Use print button on toolbar to print your design's values.
4	Enter the following
5	Band in Mc		7.1
6	Desired Output Pwr		5
7	Power Supply Voltage		12
8	Mosfet Type		IRF510									Intermediate Calcs for L2
9	Rdson Ω		0.54									30.39683237
10	Coss pF		81									0.6817267509
11	Calculations
12	Load Resistance Ω		8
13	C1 pF *		452
14	Choose C2 pF **		1402
15	L2 uH		0.68
16	C3 pF		1121
17	C5 pF		1121
18	L3 uH		0.34
19	C4 pF		374
20	Choose L1 uH ***		10.23
21	* Must be mounted vy close to the MOSFET. Directly bridge the drain and source if possible
22	** Reactance of C2 must be 1 - 2 x load resistance R ... C for 2RXc is calculated for you
23	*** Must be >10 x L2 ... 15 x L2 is calculated for you
24	Data (typical) for popular MOSFETS for QRP Pwr Amps						Capacitors: Use NP0, C0G, or Silver Mica
25		2N7000	BS170	IRF510	IRF520	STP16NF06	Recommended Toroid Cores: T50-6 or T50-7
26	Voltage	60	60	100	100	60	Get toroid calculator here:		http://www.kitsandparts.com/tcalc.html
27	Id	200ma	500	5.6A	9.2	16	Reference and recommended reading:
28	Rdson Ω	1.2	1.2	0.54	0.25	0.08	Cripe, David, NMØS, "Class E Power Amplifiers for QRP"
29	Coss * pF	11	17	81	130	70	QRP Quarterly Vol 50 Number 3 Summer 2009, pp 32-37
30	Pwr Out W	1 to 1.5	1 to 2	2 to 10	2 to 20	2 to 20	Errata: Volume 50 Number 4 Fall 2009 p4
31	Case	TO-92	TO-92	TO-220	TO-220	TO-220
32	*Output capacitance i.e. Drain to Source Capacitance							Spreadsheet by	WAØITP
33	Can be paralleled for more output. Calculate the parallel Coss and Rdson								Design Formulas and Specs by	NMØS	17-Sep-10
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39			Cell D12 should be:Âtimes, serif; BACKGROUND-COLOR: #fff">Cell D12 should be:Â =ROUND((0.32D7D7)/D6-1.5*D9,0)
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