CN1691518A - Single-electron digital-to-analog signal conversion device - Google Patents

Abstract

A digital-to-analog signal conversion device, characterized in that it includes: a digital-to-analog signal conversion unit; a single-electron output circuit, the input end of the single-electron output circuit is connected to the output end of the digital-to-analog signal conversion unit, and the circuit’s The output end gives the final analog signal output; the digital-to-analog signal conversion device is composed of the above circuits, and the n-bit input digital signal first reaches a 1, ^{2, 2 2} , 2 ³ , ... 2 ^n-1 weighted n-way capacitor array In the digital-to-analog signal conversion part, the single-electron output circuit will control the output range of the analog signal to obtain a stable output analog signal.

Description

Single-electron digital-to-analog signal conversion device

technical field

The invention relates to the technical field of signal processing for converting from digital signals to analog signals, in particular to a single-electron digital-to-analog signal conversion device.

Background technique

Variables in nature appear in analog form, but most of the current information processing, information storage and information transmission are carried out in digital form. Therefore, a signal conversion device (ADC) that converts an analog signal into a digital signal and a signal conversion device (DAC) that converts a digital signal into an analog signal are indispensable in modern signal processing systems.

Semiconductor integrated circuits have been developing in the direction of high integration, high speed and low power consumption. Single-electron digital-to-analog signal converters (DACs) are the most promising to replace traditional DAC circuits due to their advantages of high integration, low power consumption, and high speed. Currently, there are studies on single-electron DAC circuits, but they all work only at low temperatures. Unable to meet the requirements of working at room temperature.

content of the invention

The object of the present invention is to provide a digital-to-analog signal conversion device, which has the advantages of simple structure, low power consumption, high integration, high precision and good stability.

Technical solution of the present invention is:

The present invention relates to a digital-to-analog signal conversion device, characterized in that it comprises:

A capacitor array digital-to-analog signal conversion unit, where n-bit input digital signals are directly added to the capacitor array;

A single-electron output circuit, the input end of the single-electron output circuit is connected to the output end of the digital-to-analog signal conversion unit, and the output end of the circuit provides the final analog signal output;

The digital-to-analog signal conversion device is composed of the above circuits. The n-bit input digital signal first reaches a 1, ^2, 2 2 , 2 ³ , ..... 2 ^n-1 weighted n-way capacitor array digital-to-analog signal conversion unit, single electron The output circuit will control the output range of the analog signal to obtain a stable output analog signal. The single-electron output circuit includes: a double-gate single-electron transistor; a MOS transistor and a current source.

The invention relates to a DAC circuit mixed with a single electron transistor and a MOS transistor. They have the following advantages:

1) It is easy to realize in technology;

2) Able to work at room temperature;

3) It has good stability;

4) Good linearity;

5) High precision;

6) The structure is simple.

Description of drawings

In order to further illustrate the technical content of the present invention, below in conjunction with accompanying drawing and embodiment the present invention is described in further detail as follows, wherein:

Figure 1 is a schematic diagram of a single-electron digital-to-analog signal conversion device;

2 is a schematic diagram of an embodiment of an n-bit digital-to-analog signal conversion device of the present invention;

Detailed ways

As shown in FIG. 1 , the n-bit digital-to-analog signal conversion device is composed of a digital-to-analog signal conversion unit 10 and a single-electron output circuit 20 . Its connection relationship is: a digital-to-analog signal conversion part 10; a single-electron output circuit 20, the input end of the single-electron output circuit is connected to the output end of the digital-to-analog signal conversion part, and the output end of the circuit gives the final analog signal output. The n-bit input digital signal first arrives at a 1, ² , 2 2 , 2 ³ , ..... 2 ^n-1 weighted n-way capacitance array digital-to-analog signal conversion unit, and the single-electron output circuit will control the output range of the analog signal. Get a stable output analog signal.

As shown in FIG. 2 , the circuit of the embodiment of the n-bit digital-to-analog signal conversion device is composed of a capacitor array digital-to-analog signal conversion unit 10 and a single-electron output circuit 20 . Capacitor array digital-to-analog signal conversion unit 10 is a network composed of n+1 capacitors C _i =2 ⁱ C (I=0, 1, 2, ... n-1) and _CH , and one end of capacitor C _i is connected to the input digital The other end of the signal is connected to other capacitors, the input end of the capacitor C _H is connected to the bias voltage V _H , and the other end is connected to the output end connected to the capacitor C _i , and V _H is used to control the range of the output analog signal. The single-electron output circuit 20 is composed of a double-gate single-electron transistor SET, a MOS transistor M and a current source A. The input end of the single-electron output circuit is connected with the output end of the digital-to-analog signal conversion section, and the output end of the circuit is given Final analog signal output. As the input digital signal changes, the output terminal outputs a corresponding analog signal, which realizes the signal conversion of converting the digital signal into an analog signal.

Claims (2)

1. digital analogue signal conversion equipment is characterized in that it comprises:

One digital analogue signal converter section;

One single electron output circuit, the input of this single electron output circuit links to each other with the output of digital analogue signal converter section, and the output of this circuit provides final analog signal output;

Form the digital analogue signal conversion equipment by above circuit, n position supplied with digital signal at first arrives one 1,2,2 ², 2 ³... 2 ^N-1The n road capacitor array digital analogue signal converter section of weighted, the single electron output circuit will be controlled the output area of analog signal, obtain stable output analog signal.

2. analog and digital signal conversion equipment as claimed in claim 1 is characterized in that, the single electron output circuit is by a pair of bar single electronic transistor, and a MOS transistor and a current source constitute, the auxiliary grid V of single-electronic transistor _SjConnect a fixing bias voltage, the grid V of MOS transistor _GjConnect a fixing bias voltage.