The claimed electric torch is used for supplying illumination. The readout circuit includes unit cell electronics, orthogonal transfer structures, and data handling structures. Four arms project in a radial direction from the rotating shaft and include four paddles with respective stirring blades spaced from each other in an axial direction on the rotating shaft. Other semiconductor substrates on a vertical line passing a main surface of the reference active region are located in sequence. The compensation circuit is configured to compensate for a mismatch between the first controllable delay and the second controllable delay to provide a fourth signal in response to the first signal and a fifth signal approximately 180 degrees out of phase with the fourth signal in response to the second signal.