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System and method for biasing active devices

A technology of active devices and bias voltages, applied in amplifiers with semiconductor devices/discharge tubes, transmission systems, signal transmission systems, etc., can solve problems such as difficult implementation of LDO, LDO loop bandwidth limited by stability requirements, etc.

Active Publication Date: 2012-08-29
QUALCOMM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Furthermore, the loop bandwidth of the LDO is limited by the stability requirement, and an LDO with a response of a few nanoseconds is difficult to achieve

Method used

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  • System and method for biasing active devices
  • System and method for biasing active devices
  • System and method for biasing active devices

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Embodiment Construction

[0020] Various aspects of the disclosure are described below. It should be apparent that the teachings herein may be embodied in a wide variety of forms and that any specific structure, function, or both disclosed herein is merely representative. Based on the teachings herein one skilled in the art should appreciate that an aspect disclosed herein may be implemented independently of other aspects and that two or more of these aspects may be combined in various ways. For example, any number of the aspects presented herein may be used to implement an apparatus or practice a method. In addition, the apparatus may be implemented or the method may be practiced using other structure, functionality, or both in addition to or other than one or more aspects presented herein.

[0021] figure 1 shows a method for generating bias voltage V for active device 150 according to one aspect of the present invention B A block diagram of an exemplary apparatus 100 of FIG. The device 100 inclu...

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Abstract

An apparatus for generating a bias voltage for an active device is disclosed, comprising a first voltage source, a capacitive element adapted to generate a charge in response to the first voltage source, and a first switching element adapted to deliver the charge to generate the bias voltage for the active device. The apparatus may comprise a controller adapted to control a capacitive element based on one or more characteristics of the active device. Alternatively, the controller may also control the capacitance of the capacitive element based on a reference voltage that is, in turn, based on one or more characteristics of the active device. The apparatus may also comprise a second voltage source adapted to generate a second voltage from which the bias voltage may be generated. The second voltage may be based on one or more characteristics of the active device. The apparatus may comprise a second switching element adapted to selectively enable and disable the active device.

Description

technical field [0001] The present invention relates generally to power supply systems, and more particularly to a system and method for generating bias voltages for active devices. Background technique [0002] The bursty nature of highly dynamic loads causes the current demand on the power regulator to vary from, for example, a few microamps (μA) to tens of milliamps within a short period of time (e.g., approximately 3 nanoseconds (ns) for ultra-wideband (UWB) applications). Ann (mA). Furthermore, the power regulator must recover from the initial burst and prepare for the next burst within a very short period of time (eg 10-20 ns for pulse position UWB systems). With this rapidly changing load demand, there are load regulation specifications that typically limit the maximum voltage ripple across the load to values ​​below a few tens of millivolts (mV). [0003] The dynamic demands typically associated with burst load operation often preclude the use of conventional volta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05F1/46H03M1/80H03G3/30
CPCG05F1/46H03F1/0261H03F1/223H03F3/195H03F2200/108H03F2200/27H03F2200/294H03F2200/321H04B2001/6908H03G3/30H03M1/80
Inventor B·孙
Owner QUALCOMM INC