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Convertor for simplifying control logic/complementary current source power supply structure

A technology for controlling logic and converters, which is applied in the field of converters and can solve the problems of increasing gate delay, large area occupied by transistors, high demand, and high power dissipation

Inactive Publication Date: 2004-02-18
VIA TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Depend on Figure 4 It can be seen from the control logic 42 shown in the figure that it needs at least 30*(N-1)+2 transistors to realize it; too many transistors will occupy a larger area, and the demand and power to be dissipated are also higher. The 2’s complement function realized by N-1 half adders connected in series will increase the gate delay and reduce the operation efficiency of known digital-to-analog converters

Method used

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  • Convertor for simplifying control logic/complementary current source power supply structure
  • Convertor for simplifying control logic/complementary current source power supply structure
  • Convertor for simplifying control logic/complementary current source power supply structure

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Embodiment Construction

[0030] Please refer to Figure 5 . In order to specifically illustrate the technology of the present invention, the following will first take 4 digital to analog converters as an example to illustrate the implementation situation of the present invention; and Figure 5 Shown is a schematic diagram of the functional blocks of a 4-bit embodiment 60 of the digital-to-analog converter of the present invention. The 4-bit digital-to-analog converter 60 is used to generate a corresponding output voltage Vo as output power according to a 4-bit input code 76; wherein the 4 bits of the input code 76 are bits A3 to A0, with bit A3 being the most effective Bit, bit A0 is the least significant bit. Similar to the typical architecture of known converters, the converter 60 includes a control logic 62 and a power module 64 . The control logic 62 is used to generate corresponding positive control bits Y0 to Y2 and negative control bits X0 to X2 according to the input code 76 . The power mo...

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Abstract

The converter comprises multisource of positive and negative current, an auxiliary current source and a control logic which converts the input code into multiposition of positive and negative control, to control each positive and negative current source separately for providing current on a resistance to generate the output voltage. The auxiliary current source additionally provides current on the resistance so the negative output voltage corresponding to the minus input code can be output by the converter with only carrying on 1 complement coding as per the input code by the control logic and to cooperate with the auxiliary current source to generate the said engative control position when the input code is minus of 2 complement coding.

Description

technical field [0001] The present invention relates to a digital-to-analog converter and a related control method, in particular to a converter and a related method which can simplify the control logic with a new architecture of current source configuration. Background technique [0002] Digital-to-analog converters are a common and important building block in all kinds of modern electronic circuits. Generally speaking, digital electronic data is easy to process, store, and calculate. However, to actually display the content of electronic data, it is often necessary to use a digital-to-analog converter to convert digital electronic data into analog electronic signals. For example, a digital microprocessor can be used in the control system to determine the rotational speed of the optical disc player when the motor drives the optical disc to rotate, or how much power the laser read-write head uses to burn data to the optical disc, etc. , but the digitized data of the micropr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03M1/66H03M1/74
CPCH03M1/745
Inventor 林有铨
Owner VIA TECH INC