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Trimming circuit and battery protection circuit

A trimming circuit and trimming technology, which is applied in the electronic field, can solve the problems of only one-way trimming and poor trimming accuracy of the trimming circuit, and achieve the effect of improving trimming accuracy and correcting accuracy deviations

Pending Publication Date: 2021-03-30
SHENZHEN ICM MICROELECTRONICS CO LTD
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  • Abstract
  • Description
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Problems solved by technology

[0004] The invention provides a trimming circuit and a battery protection circuit to solve the problem that the trimming accuracy of the existing trimming circuit is not good and can only be trimmed in one direction

Method used

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  • Trimming circuit and battery protection circuit
  • Trimming circuit and battery protection circuit
  • Trimming circuit and battery protection circuit

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Embodiment Construction

[0055]In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0056] The present invention provides a trimming circuit, including a trimming network, the first end of the trimming network is used as the signal output end after trimming, and the second end is connected to the signal to be trimmed, and the trimming network includes a plurality of The trimming units connected in series, each trimming unit includes a trimming point; the single-wire communication circuit, the input end of the single-wire communication circuit is connected to the clock signal output end, including multiple output ends, and each output end is connected to the clock signal output end r...

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Abstract

The invention provides a trimming circuit which comprises a trimming network connected with a signal to be trimmed, the trimming network comprising a plurality of trimming units connected in series, and each trimming unit comprising a trimming point; a single-line communication circuit, the input end of the single-line communication circuit being connected with the clock signal output end, and theoutput end of the single-line communication circuit being connected with the trimming adjustment point of each trimming unit; and the single-line communication circuit being used for generating a bitaddress according to an input clock signal and carrying out programming according to the bit address so as to change the access state of the trimming unit. Through the trimming circuit provided by the invention, the signal to be trimmed can be trimmed after the chip is packaged, the precision deviation caused by factors such as packaging stress can be effectively corrected, and the trimming precision is greatly improved; and the signals to be trimmed can be adjusted to be large or small.

Description

technical field [0001] The invention relates to the field of electronic technology, in particular to a trimming circuit and a battery protection circuit. Background technique [0002] Most of the existing battery protection circuits use laser trimming metal to trim the reference voltage inside the battery protection circuit or the battery voltage. For example, several trimming resistors connected in series are reserved, and each trimming resistor is connected in parallel with a metal sheet. When the resistance needs to be adjusted, the metal sheet connected in parallel with the adjustment resistance can be cut by laser. [0003] However, this trimming method mainly cuts off the metal sheet connected in parallel with the trimming resistor by laser to connect the trimming resistor to the resistor network. The resistance can only be adjusted to a large scale, but not to a small scale. It is necessary to set the default value of the resistance at the beginning of the design. i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00
CPCH02J7/007182H02J7/00308H02J7/00304
Inventor 李杰白青刚杨小华
Owner SHENZHEN ICM MICROELECTRONICS CO LTD
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