Fairchild Semiconductor Corporation

Juha-Matti Kujala

Juha Joonas Oikarinen

Jonathan Klein

Jouni Mika Kalervo Vuorinen

This document discusses, among other things, a resistance multiplier configured to provide a more specific and controllable resistance value, the resistance multiplier including an amplifier configured to control a resistance across a first transistor using a received reference resistance value and to control a resistance across a second transistor using the resistance across the first transistor and a relationship between the first and second transistors.

Resistance multiplier

This document discusses apparatus and methods associated with an early warning strobe input of a boost converter. In an example, a method of increasing a set point of a boost converter configured to provide power to a mobile device can include receiving an indication that the mobile device will transition from the first low-power mode to a second higher-power mode; and increasing the set point of the boost converter in response to the indication.

Early warning strobe for mitigation of line and load transients

This document discusses apparatus and methods for a boost converter start-up circuit. In an example, a start-up circuit can include a linear current generator configured to couple a supply terminal of the voltage converter to an output terminal of the voltage converter. The linear current generator can include a modified current mirror and a feedback circuit configured to provide a first representative of an output voltage of the output terminal to an input of each of a first and a second adjustable current source of the modified current mirror.

Adaptive startup control for boost converter

This document discusses, among other things, voltage converters and computed on-time voltage converters. In an example, an on-time generator for a voltage converter can include a timing capacitor configured to provide a timing voltage, a comparator configured to receive the timing voltage and a threshold voltage and to provide the timing signal using a comparison of the timing voltage and the threshold voltage, a current source configured to discharge the timing voltage of the timing capacitor after a start-up delay, and first and second compensation capacitors configured to bias the timing voltage of the timing capacitor to compensate for the start-up delay.

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Kokkola, Finland

Juha-Matti Kujala