Psemi Corporation

Semiconductor Components Industries, LLC

Simon Charles Denny

Scott Parish

Quinn Kneller

Mark Moffat

Paul Denny

Martin Jonathan Steadman

Saket Sharma

An image sensor may be formed from stacked first and second substrates. An array of imaging pixels and verification circuitry may be formed in the first substrate. Row control circuitry may be formed in the second substrate. The row control circuitry may provide row control signals to the array of imaging pixels. The verification circuitry may also receive the row control signals from the row control circuitry. The first substrate may include a plurality of n-channel metal-oxide semiconductor transistors and may not include any p-channel metal-oxide semiconductor transistors. The verification circuitry may include an SR latch circuit with an S node coupled to a pull-up line and an R node coupled to a pull-down transistor to ensure the SR latch circuit starts up in a set state. The verification circuitry may include a level shifter that shifts a control signal voltage when the control signal is at a low level.

Pixel control signal verification in a stacked image sensor

An improved electronic oscillator circuit suitable for use in an isolating DC-to-DC converter circuit, and an improved isolating DC-to-DC converter circuit. In one embodiment, an integrated circuit coupled to a transformer includes an oscillator and an output driver. The integrated circuit is preferably fabricated using a silicon-on-insulator technology. The oscillator outputs an alternating pulse signal defined by electrical characteristics of components other than the transformer. The alternating pulse signal is coupled to the output driver, the alternating output of which is coupled to corresponding legs of the primary winding of the transformer. The secondary winding of the transformer provides an electromagnetically coupled isolated output which may be rectified and filtered to produce a DC output voltage. Additional functionality, such as current protection circuitry for the improved circuits, may be readily added to the integrated circuit at little or no increase in cost.

Current protected integrated transformer driver for isolating a DC-DC convertor

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Reading, United Kingdom

Simon Charles Denny