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Post-driver with voltage protection

A driver and bias voltage technology, applied in the field of post-drivers with voltage protection, can solve problems such as post-driver operation errors and transistor damage

Pending Publication Date: 2022-04-12
SIGMASTAR TECH LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these transistors can be damaged by large voltage differences, making the operation of the rear driver erroneous

Method used

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  • Post-driver with voltage protection
  • Post-driver with voltage protection
  • Post-driver with voltage protection

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Embodiment Construction

[0012] All terms used herein have their ordinary meanings. The definitions of the above-mentioned words in commonly used dictionaries, and the usage examples of any words discussed here in the content of this application are only examples, and should not limit the scope and meaning of this application. Likewise, the present application is not limited to the various embodiments shown in this specification.

[0013] As used herein, "coupling" or "connection" can refer to two or more components that are in direct physical or electrical contact with each other, or indirect physical or electrical contact with each other, and can also refer to two or more components. Components interoperate or act. As used herein, the term "circuit" may be a device that is connected in a certain manner to process signals by at least one transistor and / or at least one active and passive components.

[0014] figure 1 It is a schematic diagram of a post driver (post driver) 100 drawn according to so...

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PUM

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Abstract

The embodiment of the invention discloses a rear driver with voltage protection. The rear driver comprises an input pair circuit, a protection circuit, a common mode sensing circuit and an amplifier. The input pair circuit outputs a first signal from a first node and outputs a second signal from a second node according to a first input signal and a second input signal. The protection circuit provides voltage protection for the input pair circuit according to a plurality of first bias voltages and a plurality of second bias voltages, transmits a first signal to a first load to generate a first output signal, and transmits a second signal to a second load to generate a second output signal. The common mode sensing circuit senses a level of the first node and a level of the second node to generate a feedback signal. The amplifier generates a second bias voltage according to a reference voltage and the feedback signal.

Description

technical field [0001] The present application relates to the technical field of rear drivers, in particular to a rear driver with voltage protection. Background technique [0002] Postdrivers are commonly found in transmitters and can be used to output differential signals with large swings. In practical applications, limited by the types of transistors available in the manufacturing process, it may be necessary to use transistors with lower withstand voltage to implement the post-driver. However, these transistors can be damaged by large voltage differences, making the operation of the rear driver erroneous. Contents of the invention [0003] An embodiment of the present application provides a post driver with voltage protection. [0004] In some embodiments, the post driver includes an input pair circuit, a protection circuit, a common-mode sensing circuit, and an amplifier. The input pair circuit outputs a first signal from a first node and a second signal from a se...

Claims

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Application Information

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IPC IPC(8): H03K17/041H03K17/687
CPCH03F1/523H03F3/45188H03F3/45677H03F2203/45008H03F2203/45424H03F2203/45302H03F3/45654H03F3/45183
Inventor 顾银银何泽炜徐兆启孙凯
Owner SIGMASTAR TECH LTD