Pulse generation system and method

一种脉冲、设备的技术，应用在传输系统、数字传输系统、延迟输出脉冲操作等方向，能够解决维持精确脉冲宽度任务困难等问题，达到节省电力的效果

Inactive Publication Date: 2011-12-28
QUALCOMM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The task of maintaining an accurate pulse width becomes more difficult as the pulse width narrows

Method used

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  • Pulse generation system and method
  • Pulse generation system and method
  • Pulse generation system and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] see figure 1 , an illustrative embodiment of a system that generates a pulsed signal and applies the pulsed signal to a memory is depicted and indicated generally at 100 . The system 100 includes a write pulse generator device 102 coupled to a non-volatile random access memory (NVRAM) 112 . In particular illustrative examples, NVRAM 112 is flash memory, ferroelectric random access memory (FeRAM), or magnetic random access memory (MRAM). Write pulse generator device 102 generates input 114 , which is applied to NVRAM 112 . The write pulse generator device 102 includes a reference circuit 110 and a pulse width generator 104 . The pulse width generator 104 includes a coarse control circuit 108 and a fine control circuit 106 . Input 114 includes a write pulse 130 having a leading edge 132 (eg, generated in response to write command 120) and a trailing edge 134 (eg, in response to a delayed digital output signal (referenced below). image 3 described), the pulse 130 is a...

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PUM

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Abstract

In a particular embodiment, an apparatus (102) includes a reference voltage circuit (110) for generating a controlled voltage. The device includes: a frequency circuit (106) configured to generate a frequency output signal (328) having a preset frequency; and a counter (304) to generate a count signal (310) based on the preset frequency. The device also includes a delay circuit (306) coupled to receive the count signal and generate a delayed digital output signal (312); and a latch (320) to generate a pulse (130). The pulse has a first edge (132) in response to a write command and a trailing edge (134) formed in response to the delayed digital output signal. In a particular embodiment, the pulse width of the pulse corresponds to an applied current level that exceeds a critical current enabling data to be written to an element of the memory, but does not exceed a predetermined threshold.

Description

technical field [0001] The present invention generally relates to a system and method for write pulse generation. Background technique [0002] Advances in technology have produced 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 portable by users. Portable wireless telephones, such as cellular telephones and IP telephones, not only communicate voice and data packets over wireless networks, but can also have other types of devices incorporated therein. For example, wireless telephones may also incorporate digital still cameras, digital video cameras, digital recorders, and audio file players. Also, the wireless telephone can process executable instructions of a software application, such as a web browser application ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11C7/22G11C16/12H03K7/08H04L7/033
CPCH03K2005/00293G11C7/22G11C16/12G11C7/04H03K7/08
Inventor 哈利·拉奥阿诺什·B·达维埃尔瓦拉朴东奎杨赛森
Owner QUALCOMM INC
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