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Voltage level shifter with dynamic circuit structure having discharge delay tracking

a technology of voltage level shifting and dynamic circuit structure, applied in logic circuits, pulse techniques, digital storage, etc., can solve problems such as some amount of power consumption, and achieve the effect of reducing or eliminating effects

Active Publication Date: 2011-08-11
QUALCOMM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0008]One particular advantage provided by at least one of the disclosed embodiments is a voltage level shifter capable of operation across a variety of voltage domains by using the keeper circuit of a dynamic circuit structure that is enabled after discharge of the dynamic node of the dynamic circuit structure. Thus, timing of the keeper circuit tracks a discharge time of the dynamic node and reduces or eliminates effects due to early enable of the keeper circuit, such as lowering of a voltage shifting operating limit and speed, and effects due to late enable of the keeper circuit, such as voltage drop due to pull-down leakage.

Problems solved by technology

Each of these portable personal computing devices may include a variety of different electronic devices all of which consume some amount of power.

Method used

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  • Voltage level shifter with dynamic circuit structure having discharge delay tracking
  • Voltage level shifter with dynamic circuit structure having discharge delay tracking
  • Voltage level shifter with dynamic circuit structure having discharge delay tracking

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Embodiment Construction

[0017]Referring to FIG. 1, a first embodiment of a system that can be used as a voltage level shifter that tracks a discharge delay of a dynamic node 130 of a dynamic circuit structure 102 is depicted. The system of FIG. 1 includes the dynamic circuit structure 102 and a discharge delay tracking circuit 104. The dynamic circuit structure 102 is responsive to the discharge delay tracking circuit 104 to control charging elements and discharging elements coupled to the internal dynamic node 130.

[0018]The dynamic circuit structure 102 receives a clock signal 118 and a discharge signal 122 as inputs and generates an output 140 via an inverter 126 that is coupled to the dynamic node 130. The dynamic circuit structure 102 can operate by receiving the discharge signal 122 from a first voltage domain and providing an output signal 140 to correspond to the discharge signal 122 shifted to a second voltage domain, as will be explained with respect to FIG. 2. The dynamic circuit structure 102 al...

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Abstract

An apparatus is disclosed. In a particular embodiment, the apparatus includes a a dynamic circuit structure that includes a dynamic node coupling a precharge circuit, a discharge circuit, and a gated keeper circuit. The gated keeper circuit is enabled by a signal from a discharge delay tracking circuit.

Description

I. FIELD[0001]The present disclosure is generally related to a voltage level shifting circuit.II. DESCRIPTION OF RELATED ART[0002]Advances in technology have resulted in smaller and more powerful personal computing devices. For example, there currently exist a variety of portable personal computing devices, including wireless computing devices, such as portable wireless telephones, personal digital assistants (PDAs), and paging devices that are small, lightweight, and easily carried by users. More specifically, portable wireless telephones, such as cellular telephones and Internet Protocol (IP) telephones, can communicate voice and data packets over wireless networks. Many such wireless telephones incorporate additional devices to provide enhanced functionality for end users. For example, a wireless telephone can also include a digital still camera, a digital video camera, a digital recorder, and an audio file player. Each of these portable personal computing devices may include a v...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): H03K19/0175H03K19/00G11C8/08
CPCH03K19/01728H03K19/0963H03K19/01855H03K19/018521
Inventor LIN, JENTSUNGBASSETT, PAUL DOUGLAS
Owner QUALCOMM INC
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