MUMBAI, India, Sept. 22 -- Intellectual Property India has published a patent application (202641108734 A) filed by National Institute Of Technology Calicut, An Indian Institute on September 10, 2026, for Isolated Bipolar Dc Programmable Power Supply With Multi-Mode Output.

Inventors include Nimmy Paulson; Rijil Ramchand; and Harish Sudhakaran Nair.

The application for the patent was published on September 18, 2026, under issue no. 38/2026.

Abstract: ABSTRACT ISOLATED BIPOLAR DC PROGRAMMABLE POWER SUPPLY WITH MULTI-MODE OUTPUT The present invention provides an isolated bipolar DC programmable power supply system comprising a primary-side full-bridge converter with four controlled semiconductor switches (S1, S2, S3, S4) operating with phase-shift modulation to control output voltage magnitude, a center-tapped high-frequency transformer (T) providing isolation with the center-tap serving as a common output reference point (G), and a secondary-side voltage-polarity generation stage. The secondary-side stage includes a first diode arrangement with two diodes (D1 and D2) having cathodes connected at a positive rectified node (e) for positive voltage generation, a second diode arrangement with two diodes (D3 and D4) having anodes connected at a negative rectified node (f) for negative voltage generation in an anti-parallel configuration, a first controlled switch (S5) with drain connected to the positive rectified node (e) and source connected to a switching node (g), and a second controlled switch (S6) with source connected to the negative rectified node (f) and drain connected to the switching node (g) in opposite orientation for polarity selection. An LC output filter (L and C) delivers power to fixed output terminals. The power supply operates in three distinct modes generating positive, negative, or bipolar programmable waveforms including DC, sinusoidal, square, triangular, sawtooth, pulsed, and offset voltages without external polarity-reversing circuits. The present invention also discloses a method of operation. FIG. 2

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