17819329. Tunable bandpass low noise amplifier simplified abstract (Intel Corporation)

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Tunable bandpass low noise amplifier

Organization Name

Intel Corporation

Inventor(s)

Sashank Krishnamurthy of Hillsboro OR (US)

Ofir Degani of Nes-Ammim (IL)

Ashoke Ravi of Portland OR (US)

Tunable bandpass low noise amplifier - A simplified explanation of the abstract

This abstract first appeared for US patent application 17819329 titled 'Tunable bandpass low noise amplifier

Simplified Explanation

The patent application describes a tunable bandpass low-noise amplifier (LNA) that includes N-path filters and cascode amplifiers.

  • The LNA consists of multiple N-path filters and cascode amplifiers.
  • Cascode amplifiers amplify the input signal.
  • Each N-path filter is connected to a different cascode amplifier.
  • N-path filters are driven by local oscillator (LO) signals with different frequencies.
  • Output nodes of cascode amplifiers are connected in parallel.
  • LO signals are symmetrically spaced around a desired frequency.
  • N-path filters are connected to the common-gate device of the coupled cascode amplifier.
  • LO signals are generated by a digital-to-time converter (DTC)-based frequency synthesizer.
  • The frequencies of LO signals can be adjusted to tune the bandwidth of the bandpass LNA.
      1. Potential Applications
  • Wireless communication systems
  • Radar systems
  • Satellite communication systems
      1. Problems Solved
  • Tuning the bandwidth of the LNA
  • Achieving low noise amplification
  • Improving signal reception in communication systems
      1. Benefits
  • Tunable bandwidth for flexibility in different applications
  • Low noise amplification for improved signal quality
  • Efficient signal reception in various communication systems


Original Abstract Submitted

A tunable bandpass low-noise amplifier (LNA). The LNA includes a plurality of N-path filters and a plurality of cascode amplifiers. The cascode amplifiers are configured to amplify an input signal. Each N-path filter is coupled to a different one of the plurality of cascode amplifiers. The plurality of N-path filters are driven by local oscillator (LO) signals having different frequencies, and output nodes of the plurality of cascode amplifiers are coupled in parallel. The frequencies of the LO signals may be symmetrically spaced around a desired frequency (f). Each N-path filter may be coupled to a source of the common-gate device of the coupled cascode amplifier. The LO signals may be generated by a digital-to-time converter (DTC)-based frequency synthesizer. The frequencies of the LO signals supplied to the N-path filters may be adjusted to tune the bandwidth of the bandpass LNA.

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