Unlock instant, AI-driven research and patent intelligence for your innovation.

A sampling device for analog signal

An analog signal and sampling device technology, applied in signal transmission systems, electrical signal transmission systems, analog-to-digital converters, etc., can solve problems such as poor linearity, and achieve the effect of high linearity sampling

Inactive Publication Date: 2007-05-16
VIMICRO CORP
View PDF1 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] It can be seen from the above that when the analog signal sampling circuit shown in Figure 2 is sampling, the PMOS transistor is turned on, the voltage potential on the gate is constant at -3V, and the voltage potential on the source is V in , the potential difference between source and gate is (-3-V in ), because the on-resistance of the PMOS transistor is related to the potential difference between the source and the gate, thus causing the sampling signal V output by the analog signal sampling circuit o Poor linearity

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A sampling device for analog signal
  • A sampling device for analog signal
  • A sampling device for analog signal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0034] The core idea of ​​the present invention is to set the bias circuit so that the transistor in the sample and hold circuit is in the on or off state within the corresponding time period: when the transistor is in the on state, the potential between the transistor control electrode and the first electrode The difference remains constant and does not change with the change of the input voltage signal, realizing high linearity sampling of the input analog signal; when the transistor is in the off state, it maintains the high linearity sampling signal.

[0035] In order to make the purpose, 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 specific embodiments.

[0036] Fig. 3 is a structural schematic diagram of an analog signal sampling device of the present invention. As shown in Fig. 3, the device includes a sample-and-hold circuit 32 and a b...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The disclosed sampling device for analog signal comprises a sampling hold circuit and an offset circuit to turn on or off transistor in last circuit. Wherein, when turning on the transistor, keeping the potential difference between the control electrode of transistor and the first electrode as constant for high linear sampling; when turning off the transistor, holding the sample signal.

Description

technical field [0001] The invention relates to an analog signal sampling technology, in particular to an analog signal sampling device. Background technique [0002] Sampling an analog signal is a prerequisite for realizing signal digitization. In the prior art, a complementary metal oxide semiconductor (MOS, Metal Oxide Semiconductor), a capacitor, and an operational amplifier are generally used to form a sampling circuit. Figure 1 is a schematic diagram of the basic structure of the existing sampling circuit, as shown in Figure 1, the sampling circuit includes: four switches sw1, sw2, sw3, sw4, two capacitors C s 、C i And an operational amplifier A, generally, the potential of the reference signal REF is one-half of the high level of the power supply of the operational amplifier A used, and the switch sw1 generally uses a P-channel MOS transistor (PMOS transistor) to effectively prevent the clamping phenomenon from occurring . When the clock signal PH1 is 1 (high level...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): H03M1/12H03M1/34
Inventor 孙涛
Owner VIMICRO CORP