18068837. WIDEBAND CURRENT-MODE LOW-PASS FILTER CIRCUITS simplified abstract (QUALCOMM Incorporated)
Contents
WIDEBAND CURRENT-MODE LOW-PASS FILTER CIRCUITS
Organization Name
Inventor(s)
Peter Gazzerro of San Diego CA (US)
Nitz Saputra of Burlingame CA (US)
Ashok Swaminathan of Cardiff CA (US)
Osama Elhadidy of San Diego CA (US)
WIDEBAND CURRENT-MODE LOW-PASS FILTER CIRCUITS - A simplified explanation of the abstract
This abstract first appeared for US patent application 18068837 titled 'WIDEBAND CURRENT-MODE LOW-PASS FILTER CIRCUITS
The patent application describes methods and apparatus for filtering a signal using a current-mode filter circuit implementing source degeneration.
- The filter circuit includes an input node, an output node, and a power supply node.
- It also includes a first transistor with a drain coupled to the input node, and a second transistor with a drain coupled to the output node and a gate coupled to the gate of the first transistor.
- A capacitive element is coupled between the drain of the first transistor and the power supply node.
- A resistive element is coupled between the drain and the gate of the first transistor.
- Source degeneration elements are coupled between the sources of the transistors and the power supply node.
Potential Applications: - Signal processing in audio equipment - Filtering noise in communication systems - Enhancing signal quality in medical devices
Problems Solved: - Improving signal filtering accuracy - Reducing noise interference - Enhancing overall signal quality
Benefits: - Enhanced signal processing capabilities - Improved noise reduction - Increased signal fidelity
Commercial Applications: Title: "Advanced Signal Filtering Technology for Enhanced Audio Equipment" This technology can be utilized in high-end audio equipment to provide superior sound quality, making it appealing to audiophiles and professionals in the music industry. The market implications include increased demand for premium audio products and potential partnerships with audio equipment manufacturers.
Prior Art: Readers can explore prior research on current-mode filter circuits and source degeneration in signal processing to understand the evolution of this technology.
Frequently Updated Research: Researchers are continually exploring new ways to optimize current-mode filter circuits for various applications, including in the fields of telecommunications and medical devices.
Questions about Current-Mode Filter Circuits: 1. How does source degeneration improve the performance of the filter circuit? Source degeneration helps to stabilize the operating point of the transistors, resulting in more consistent and accurate signal filtering.
2. What are the key differences between current-mode and voltage-mode filter circuits? Current-mode filter circuits operate based on current signals, while voltage-mode filter circuits use voltage signals for processing.
Original Abstract Submitted
Methods and apparatus for filtering a signal using a current-mode filter circuit implementing source degeneration. An example filter circuit generally includes an input node; an output node; a power supply node; a first transistor comprising a drain coupled to the input node; a second transistor comprising a drain coupled to the output node and comprising a gate coupled to a gate of the first transistor; a capacitive element coupled between the drain of the first transistor and the power supply node; a first resistive element coupled between the drain and the gate of the first transistor; a first source degeneration element coupled between a source of the first transistor and the power supply node; and a second source degeneration element coupled between a source of the second transistor and the power supply node.
