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Current correction circuit for adjusting current input generated by current source, current correction method, and ramp wave generator

A current correction and current adjustment technology, which is applied in the direction of electric pulse generator circuit, electric variable adjustment, instrument, etc., can solve the problems of current fluctuation and influence on the performance of ramp wave generator, and achieve the effect of improving performance

Active Publication Date: 2016-06-29
HIMAX IMAGING LIMITED
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Problems solved by technology

Since the bandgap reference voltage (bandgapreference voltage) can provide a stable voltage source, the bandgap reference voltage can be converted into the required current through a resistive element, however, the resistance value of the resistive element will still change slightly , causing the current generated based on the bandgap reference voltage to vary, which in turn affects the performance of the ramp generator

Method used

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  • Current correction circuit for adjusting current input generated by current source, current correction method, and ramp wave generator
  • Current correction circuit for adjusting current input generated by current source, current correction method, and ramp wave generator
  • Current correction circuit for adjusting current input generated by current source, current correction method, and ramp wave generator

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Embodiment Construction

[0015] see figure 1 , figure 1 It is a schematic functional block diagram of an embodiment of the generalized current correction circuit of the present invention. The current correction circuit 100 is used to adjust the current input I_IN generated by the current source CR, and includes a processing function block 110 and an adjustment function block 120 . Depend on figure 1 It can be seen that the processing function block 110 is coupled to the current source CR for receiving a predetermined reference voltage input V_IN and a current input I_IN, and generates a processing result PR according to the predetermined reference voltage input V_IN and the current input I_IN. The adjustment function block 120 is coupled to the processing function block 110 and the current source CR, and is used to generate an adjustment signal S_A to the current source CR to adjust the current input I_IN according to the processing result PR, so that the magnitude of the current input I_IN is consi...

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Abstract

The invention provides a current correcting circuit and method for adjusting current input generated by a current source, and an oblique wave generator. The current correcting circuit comprises a processing function module and an adjusting function module, the processing function module is coupled to the current source and used for receiving preset reference voltage input and the current input and generating a processing result according to the preset reference voltage input and the current input, and the adjusting function module is coupled to the processing function module and the current source and used for generating an adjusting signal to the current source to adjust the current input so as to enable the current input and the preset reference voltage input to be in a preset ratio.

Description

technical field [0001] The present invention relates to current correction, in particular to a current correction circuit for adjusting the current input generated by a current source, and its related current correction method and ramp generator. Background technique [0002] The ramp linearity and ramp slope accuracy of the ramp generator can be improved by providing a stable current source. Since the bandgap reference voltage (bandgapreference voltage) can provide a stable voltage source, the bandgap reference voltage can be converted into the required current through a resistive element, however, the resistance value of the resistive element will still change slightly , causing the current generated according to the bandgap reference voltage to vary, thereby affecting the performance of the ramp generator. [0003] Therefore, there is a need for a design mechanism that enables the current source to provide current input stably to solve the above problems. Contents of t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05F1/56H03K3/02
Inventor 印秉宏
Owner HIMAX IMAGING LIMITED
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