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Category: Hardware Notes
Non‐Isolated AC/DC Power Supply Design and Implementation based on Power Integrations LNK3205
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Philips Sonicare Electric Toothbrush Measurements without Teardown
Part I: Sonicare Electric Toothbrush Architecture Figure 1: Sonicare Electric Toothbrush Architecture This electric toothbrush is a water-resistant design, thus it adopts wireless charging technology. Coil 2 is the wireless charging receiver. A permanent magnet is attached to the trail…
Preamplifier 30 MHz to 6 GHz
Part I: Introduction I designed two preamplifiers which can be added to any application needs additional gain. The two designs have the same PCB layout but different IC U1 which is shown in the Figure 1. The PCB is shown…