Conditionally-stable operational amplifier with tunable wideband buffers
a buffer and buffer technology, applied in the field of signal amplification, can solve the problems of limited feedback factor range and amplifier will not be stabl
Active Publication Date: 2014-02-06
GOOGLE LLC
View PDF0 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Benefits of technology
The patent describes a method and system for a conditionally-stable operational amplifier that can adjust its gain curve to a desired position using a tunable wideband buffer. This allows for optimal performance at a specific frequency. The buffer can be adjusted based on the desired feedback factor, and a look-up table can be used to select the appropriate buffer adjustment value. The conditionally-stable operational amplifier can also be tuned to shift its phase curve without affecting its gain curve. The technical effect of this invention is to provide a more efficient and effective operational amplifier for signal processing.
Problems solved by technology
However, in a conventional conditionally stable operational amplifier, if the feedback factor is moved too high or too low, the amplifier will not be stable because the phase value at the frequency where the gain curve reaches 0 dB frequency will be below the acceptable threshold.
The limitation on the acceptable range of variation of the feedback factor presents a difficulty in instances when the conditionally-stable operational amplifier needs to operate within a large range of feedback factor values.
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0019]As utilized herein the terms “circuits” and “circuitry” refer to physical electronic components (i.e. hardware) and any software and / or firmware (“code”) which may configure the hardware, be executed by the hardware, and or otherwise be associated with the hardware. As utilized herein, “and / or” means any one or more of the items in the list joined by “and / or”. As an example, “x and / or y” means any element of the three-element set {(x), (y), (x, y)}. As another example, “x, y, and / or z” means any element of the seven-element set {(x), (y), (z), (x, y), (x, z), (y, z), (x, y, z)}. As utilized herein, the term “e.g.,” introduces a list of one or more non-limiting examples, instances, or illustrations.
[0020]The present disclosure relates to a method and system for conditionally-stable operational amplifier with tunable wideband buffers. In various implementations, one or more tunable wide-band buffers may be added into a conditionally-stable operational amplifier, allowing the amp...
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
Login to View More Abstract
A method for processing signals may include, in a conditionally-stable operational amplifier, shifting the gain curve of the conditionally-stable operational amplifier to a desired position, by buffering at least one output signal from at least one transconductance module within the conditionally-stable operational amplifier using a buffer. The desired position of the gain curve may be associated with a desired feedback factor. The shifting of the gain may take place without shifting a corresponding phase. The tuning of the buffer may be based on the desired position of the gain curve which is derived from feedback factor value(s) specified by an application. A phase corresponding to the desired position of the gain curve at 0 dB frequency may be greater than a threshold phase. The buffering may be tuned using at least one tunable wideband buffer so that the corresponding phase at 0 dB frequency remains higher than the threshold phase.
Description
TECHNICAL FIELD[0001]Aspects of the present application relate generally to the field of signal amplification. More specifically, certain implementations of the present disclosure relate to a conditionally-stable operational amplifier with tunable wideband buffers.BACKGROUND[0002]A conditionally-stable operational amplifier is commonly used in applications where a large gain is required from the operational amplifier at relatively high frequencies. Operational amplifiers are usually used in a feedback configuration with a certain feedback factor, which is determined by the application. Many applications also require that the operational amplifier work with a range of feedback factor values instead of a single fixed feedback factor value. However, in a conventional conditionally stable operational amplifier, if the feedback factor is moved too high or too low, the amplifier will not be stable because the phase value at the frequency where the gain curve reaches 0 dB frequency will be...
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
Login to View More IPC IPC(8): H03G3/30
CPCH03F1/34H03F1/086H03F3/45237H03F2200/405H03G1/0029H03G1/007
Inventor WU, HONGLEI
Owner GOOGLE LLC