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A Digital Trimming System Based on Pin Multiplexing

A pin multiplexing and digital technology, which is applied in the direction of logic circuit interface device, logic circuit connection/interface layout, etc., can solve the problems of increasing the number and cost of chip pins, false triggering and adjustment, etc., so as to avoid false adjustment , the effect of reducing the number of pins

Active Publication Date: 2018-09-28
HUNAN ADVANCECHIP ELECTRONICS TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This will increase the number of chip pins and cost, and may lead to false trigger trimming

Method used

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  • A Digital Trimming System Based on Pin Multiplexing
  • A Digital Trimming System Based on Pin Multiplexing
  • A Digital Trimming System Based on Pin Multiplexing

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Embodiment Construction

[0023] The present invention will be further explained below in conjunction with the drawings and embodiments. In the following detailed description, only certain exemplary embodiments of the present invention are described by way of illustration. Needless to say, those of ordinary skill in the art can realize that the described embodiments can be modified in various ways without departing from the spirit and scope of the present invention. Therefore, the drawings and description are illustrative in nature, and are not used to limit the protection scope of the claims.

[0024] Such as figure 2 As shown, a digital trimming system based on pin multiplexing includes a control circuit 201 connected with trimming input pulse signals. The output ends of the control circuit 201 are respectively connected with a shift register circuit 202 and a trimming circuit 203 The output terminal of the shift register circuit 202 is connected to the input terminal of the trimming circuit 203, and ...

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Abstract

The invention discloses a digital trimming system based on pin multiplexing. The digital trimming system comprises a control circuit connected with a trimming input pulse signal. The output end of the control circuit is connected with a shift register circuit and a trimming circuit. The output end of the shift register circuit is connected with the input end of the trimming circuit. A trimming feedback circuit is connected between the output end of the trimming circuit and the input end of the control circuit. It is not required to specially use a pin of a chip as a trimming pin but to directly multiplex the function pin of the chip so that the number of the pins of the chip may decrease. The shift register circuit mainly converts the number of the pulses of the input trimming signal into a control signal to a specific bit required to be trimmed. The trimming circuit mainly receives the trimming signal of the specific bit of the shift register circuit, fuses the fuse of a corresponding bit, latches a trimming result, and outputs the trimming result to a module of which the chip is required to be trimmed. The digital trimming system may prevent erroneous trimming of the chip in a normal operating state after trimming finishes.

Description

Technical field [0001] The invention relates to the field of integrated circuit design, in particular to a trimming circuit in the field of integrated circuit design. Background technique [0002] As the requirements for the performance indicators of integrated circuits are getting higher and higher, the requirements for high-precision integrated circuits are becoming increasingly obvious. Trimming technology is a necessary means to realize high-precision integrated circuits. The trimming technology in integrated circuit design is mainly for trimming the resistor network and capacitor network. Through different trimming technologies, the resistance value and capacitance value can be increased or decreased. Trimming can be carried out either in the in-chip test stage, that is, at the wafer level, or after the chip formation test stage, that is, after dicing and packaging. Both methods have their own advantages and disadvantages. The former can select all unqualified products at t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03K19/0175
CPCH03K19/017509
Inventor 杜香聪
Owner HUNAN ADVANCECHIP ELECTRONICS TECH CO LTD
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