Patent application number | Description | Published |
20080297234 | CURRENT MIRROR BIAS TRIMMING TECHNIQUE - A reference current is generated by a current mirror circuit. An operational amplifier of a feedback circuit generates a control voltage for control of the feedback circuit transistor. The size of the feedback circuit transistor is trimmed, and the current through the feedback circuit transistor remains relatively constant via operation of the feedback circuit. The feedback circuit transistor is scaled in size relative to the size of current reference transistor(s) (e.g., current sources or sinks), which are tied to the same control voltage. The reference current of the current reference transistors thus varies with the size of the feedback circuit transistor. Further advantageously, transistors providing reference currents for resistor ladders can also be tied to the same control voltage, but scaled proportionally with changes in size to the feedback circuit transistor, thereby maintaining relatively constant voltage from taps of the resistor ladder, even when the feedback circuit transistor is trimmed. | 12-04-2008 |
20090051414 | Dual conversion rate voltage booster apparatus and method - An apparatus and method of boosting voltages. A boosting circuit includes a first and a second boosting circuit that each provide a boosted voltage in response to a set of control signals. The first and second boosting circuits receive different sets of control signals so that the boosted voltages may be alternately transferred to and combined at a load terminal. | 02-26-2009 |
20090244344 | SYSTEMS, METHODS, AND DEVICES FOR PREVENTING SHOOT-THROUGH CURRENT WITHIN AND BETWEEN SIGNAL LINE DRIVERS OF SEMICONDUCTOR DEVICES - An imaging device driver for transmitting a signal onto a signal line for controlling transistors of a pixel row. The device includes a controller and associated circuitry for reducing shoot-through current within and between row driver circuits for driving the signal line. The controller reduces shoot-through current by preventing concurrent transmission of high and low signal outputs to the signal line by respective high and low voltage sources of the same or different row driver circuits. | 10-01-2009 |
20130110444 | FAILSAFE IMAGE SENSOR WITH REAL TIME INTEGRITY CHECKING OF PIXEL ANALOG PATHS AND DIGITAL DATA PATHS | 05-02-2013 |