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Charge recovery circuitry including switching power stages with floating rails

A technology of switching circuits and circuits, applied in electronic switches, electrical components, generating electric pulses, etc., can solve problems such as low efficiency of LDO

Inactive Publication Date: 2018-09-21
QUALCOMM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, LDOs suffer from low efficiency, especially when the voltage drop across the pass device is high

Method used

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  • Charge recovery circuitry including switching power stages with floating rails
  • Charge recovery circuitry including switching power stages with floating rails
  • Charge recovery circuitry including switching power stages with floating rails

Examples

Experimental program
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Embodiment Construction

[0033] In the following description, for purposes of explanation, numerous examples and specific details are set forth in order to provide a thorough understanding of the present disclosure. However, it will be apparent to those skilled in the art that the present disclosure, as expressed in the claims, may include some or all of the features of these examples, alone or in combination with other features described below, and may further include the features and concepts described herein Modifications and equivalents of .

[0034] figure 1 is a block diagram illustrating a charge recovery circuit 100 according to one embodiment. Charge recovery circuit 100 includes a plurality of low dropout regulators (LDOs) 102 and 104 , a high-side switching transistor 106 , a low-side switching transistor 108 , and a plurality of switches 110 , 112 , 114 , 116 , 118 and 120 .

[0035] A voltage-controlled oscillator (VCO) (not shown) or other clock generator generates a clock in response...

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Abstract

A circuit is disclosed that includes a first switching transistor (106) and a second switching transistor (108). The first switching transistor and the second switching transistor are coupled in series between the input voltage and ground with a common node (switching node) therebetween to provide a switching output. A first switch circuit (120) selectively couples the gate (Gp) of the first switch transistor to the input voltage and a first mid-level voltage supply (VLS). A second switch circuit (118) selectively couples the gate (GN) of the second switch transistor to a second mid-level voltage supply (VHS) and ground. Thus, the charge recovery circuit is connected to the gate of the first switching transistor, the gate of the second switching transistor, the first mid-level voltage supply, and the second mid-level voltage supply to selectively recover the first mid-level voltage supply and a second mid-level voltage supply.

Description

[0001] related application [0002] This application claims priority to U.S. Application No. 14 / 260,733, filed April 24, 2014, and entitled "CHARGE-RECYCLING CIRCUITSINCLUDING SWITCHING POWER STAGES WITH FLOATING RAILS," which is hereby incorporated by reference in its entirety for all purposes. [0003] This application is related to U.S. Patent Application No. 14 / 260,592, filed April 24, 2014, entitled "CHARGE-RECYCLING CIRCUITS" and US Patent Application No. 14 / 260,592, filed April 24, 2014, entitled "CHARGE PUMPS HAVING VARIABLE GAIN AND VARIABLE FREQUENCY" Related to U.S. Patent Application No. 14 / 260,658, incorporated herein by reference in its entirety. technical field [0004] The present disclosure relates to charge recovery circuits, and in particular to charge recovery circuits including switching power stages with floating rails. Background technique [0005] Unless otherwise indicated herein, the approaches described in this section are not admitted to be prio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03K17/56H03K17/687
CPCH03K17/56H03K17/6874H03K2217/0036H03K2217/0081H03K3/012
Inventor S·M·萨达特史春雷詹晨昌
Owner QUALCOMM INC