2 layers
2 layers99.1 × 88.9 mm
Royer
emard/royer4Royer sinewave oscillator
- Size
- 99.1 × 88.9 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 25
- Nets
- 12
- Pads
- 60
- Tracks, vias
- 124, 0
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 4
- Created
- 16 Apr 2017
- Updated
- 18 May 2017
Overview
Royer is an open-source printed circuit board by emard, from the emard/royer repository on GitHub. It is a 2-layer board of 99.1 × 88.9 mm with 25 parts on 12 nets, routed with 124 tracks and 0 vias.
It is built around the IRG4PH50UDPBF, BY228 and IRF820. Its parts include 7 resistors, 6 capacitors, 5 diodes, 4 transistors and 2 connectors.
Main components
3README
README.mdRoyer - simple sinewave oscillator
Schematics and some PCBs practice in kicad with several variations (BJT, MOSFET, IGBT) of simple sinewave oscillators, initially published by:
George H. Royer
Electrical Manufacturing
December 1954Royer oscillator uses zero-voltage switching (ZVS) to the parallel LC resonant circuit. Voltage at LC is sinewave when oscillator is unloaded. More load will more deform the sinewave.
About regulated Royer see:
Jim Williams
Linear Technology
Application note 118
March 2008It needs a sufficiently large choke in series with middle turn of resonant L. If muddle turn is not available then 2 chokes can be used.
Parts
25| Qty | Value | Footprint | References |
|---|---|---|---|
| 3 | 16V | Discret:D6 | D2, D3, D5 |
| 2 | 15 | Resistors_ThroughHole:Resistor_Horizontal_RM20mm | R2, R6 |
| 2 | 15nF | Capacitors_ThroughHole:C_Rect_L27_W9_H17_P23 | C1, C4 |
| 2 | 22nF | Capacitors_ThroughHole:C_Rect_L27_W9_H17_P23 | C2, C3 |
| 2 | 470k | Resistors_ThroughHole:Resistor_Horizontal_RM15mm | R1, R5 |
| 2 | 680k | Resistors_ThroughHole:Resistor_Horizontal_RM15mm | R3, R4 |
| 2 | BY228 | Diodes_ThroughHole:Diode_DO-201AD_Horizontal_RM15 | D1, D4 |
| 2 | IRF820 | TO_SOT_Packages_THT:TO-220_Neutral123_Vertical_LargePads | Q2, Q3 |
| 2 | IRG4PH50UD | TO_SOT_Packages_THT:TO-247_Vertical_Neutral123_largePads | Q1, Q4 |
| 1 | 100k | Resistors_ThroughHole:Resistor_Horizontal_RM15mm | R7 |
| 1 | 1uF | Capacitors_ThroughHole:C_Rect_L27_W9_H17_P23 | C6 |
| 1 | 33nF | Capacitors_ThroughHole:C_Rect_L27_W9_H17_P23 | C5 |
| 1 | Jumper | Terminal_Blocks:TerminalBlock_Pheonix_MPT-2.54mm_2pol | JP1 |
| 1 | Screw_Terminal_1x02 | Terminal_Blocks:TerminalBlock_WAGO-804_RM5mm_2pol | J2 |
| 1 | Screw_Terminal_1x03 | Terminal_Blocks:TerminalBlock_WAGO-804_RM5mm_3pol | J1 |
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Questions
How big is the Royer PCB?
It measures 99.1 × 88.9 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Royer use?
25 parts, built around the IRG4PH50UDPBF, BY228 and IRF820. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Royer KiCad files?
From the emard/royer repository on GitHub, at the commit this page was made from: the board is IGBT-330V/pcb/kicad/royer.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Royer design in my own project?
Its repository states no licence, so its author keeps all rights: ask emard before reusing the design.