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High-voltage and low-voltage signaling output driver

A driver, low-voltage technology, used in output power conversion devices, DC power input to DC power output, instruments, etc., can solve problems such as capacitive load obstruction

Pending Publication Date: 2021-09-07
QUALCOMM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this combination of output drivers may be suitable for lower speed signaling, multiplexing two output drivers onto a single output terminal loads the output terminal with a relatively high level of output capacitance
High-speed signaling on such loaded terminals is hindered by excessive capacitive loading

Method used

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  • High-voltage and low-voltage signaling output driver

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Embodiment Construction

[0018] A mixed or combined high and low voltage data path to a mixed output driver is disclosed that accommodates both relatively high supply voltage and relatively low supply voltage signaling. Mixed output drivers drive signals from a digital core, such as in an application specific integrated circuit (ASIC) or SoC, to external circuits. It is assumed herein that the external circuit is a low power double data rate (LPDDR) dynamic random access memory (DRAM), but it should be appreciated that any external circuit with a low voltage data operation mode and a high voltage data operation mode will benefit from the disclosed herein Mixed data paths and mixed output drivers. The relatively low supply voltage is the supply voltage used for the digital core and the LPDDR DRAM during the low-voltage data mode of the LPDDR DRAM. The relatively high supply voltage is the supply voltage of the LPDDR DRAM during the high voltage data mode of the LPDDR DRAM. Digital cores continue to u...

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PUM

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Abstract

A hybrid output driver is disclosed that supports high-voltage signaling and low- voltage signaling. The high-voltage signaling is powered by a high-power supply voltage that is greater than a low-power supply voltage that powers the low-voltage signaling.

Description

[0001] Cross References to Related Applications [0002] This application claims priority and benefit to U.S. Nonprovisional Patent Application No. 16 / 743,915, filed January 15, 2020, and U.S. Provisional Application No. 62 / 794,308, filed January 18, 2019, each of which is incorporated by reference and It is hereby incorporated in its entirety for all applicable purposes as if fully set forth below. technical field [0003] This application relates to output drivers, and more particularly to hybrid output drivers for high voltage signaling and low voltage signaling. Background technique [0004] Depending on the application, the input standard / output standard have different supply voltages. For example, various supply voltages are used in the Low Power Double Data Rate (LPDDR) standard for interfacing between mobile computers (such as smartphones and tablets) and synchronous dynamic random access memory. In the LPDDR3 standard, the nominal supply voltage is 1.2V, while fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F13/40
CPCG06F13/4072H03K19/0185H03K19/1733H03K19/17744H02M3/158
Inventor Y·U·伊姆J·施耐德S·克里什纳姆尔迪M·M·拉赫曼P·马修A·托姆克C·K·万A·塞图拉姆M·N·阿卜杜拉
Owner QUALCOMM INC