Analog Devices,inc.

Analog Devices Global

Roger Peppiette

Colin Scott Ramsay

Jane Patricia Jackson

Guillaume De Cremoux

Geoffrey Thomas Haigh

Bin Shao

Gavin Patrick Cosgrave

George Redfield Spalding, Jr

Roderick McLachlan

Yanfeng Lu

Graham McCorkell

Linus Sheng

Finbarr O'Leary

Guilluame De Cremoux

This application discusses, among other things apparatus and methods for a voltage boost circuit. In an example, a voltage boost circuit can include first and second inverters, sharing a first supply node, and sharing a second supply node, a first charge transfer capacitor, configured to couple a first clock signal to the first inverter output, a second charge transfer capacitor, configured to couple a second clock signal to the second inverter output, the second clock signal being out-of-phase with the first clock signal, a first gate drive capacitor, configured to couple the first clock signal to the second inverter input, and a second gate drive capacitor, configured to couple the second clock signal to the first inverter input.

Charge pump

A DC to DC converter comprising an inductor, first and second electrically controllable switches and a controller, wherein the first electrically controllable switch is interposed between an input node and a first terminal of the inductor and the second electrically controllable switch extends between a second terminal of the inductor and a common node or a ground, and where a first rectifier extends between the common node or ground and the terminal of the inductor and a second rectifier connects the second terminal of the inductor to an output node, wherein the controller controls the operation of the first and second switches to perform voltage step down or step up, as appropriate, to achieve a desired output voltage and wherein a decision about when to switch the first electrically controlled switch is made as a first function of a voltage error between the output voltage and a target output voltage, and an estimate of the current flowing in the inductor.

Controllable DC to DC converter

A reset circuit comprising: a first depletion mode device having a first terminal coupled to a node at a reset voltage and a second terminal for providing a reset signal to at least one device; and a control circuit arranged to switch the first depletion mode device into a high impedance state after a first predetermined period.

Reset generator

DC to DC converter

A state machine implemented controller is provided in which a logic coreis reconfigurable in response to state data held within a memory. Thus, on transition from one state to a next state the data held within the memoryis used to reconfigure the operation of the logic core. This enables a relatively compact logic coreto be used time and time again, thereby avoiding the need to individually define a logic core appropriate to each individual one of the states that the state machine can enter into. This results in a controller which is much more compact on an integrated circuit die than is the case with prior art controllers.

Controller for power supplies

A sub-ranging DAC converter is provided where voltage followers rather than operational amplifiers are used to avoid loading a main resistor string.

Digital to analog converter

A communication device is provided which transmits and responds to differential currents. Thereby allowing communication between devices that may be floating with respect to each other.

Communications interface and floating devices including such an interface

A multi channel power supply detector for selecting one of a plurality of power supplies is provided. The supply selector includes a controller, and each channel has a switching device responsive to the controller in series with a current limiting device responsive to the controller.

Growing community of inventors

Edinburgh, United Kingdom

Roger Peppiette