Intermediate frequency amplifier with a configurable high-pass filter

US12021552B2 · kind B2 · utility

Assignee

• TEXAS INSTRUMENTS INCORPORATED · US

Inventors

• Karthik Subburaj · Bengaluru, IN
• Pranav SINHA · Bengaluru, IN
• Mayank Singh · Survanagiri, IN
• Rittu Sachdev · Bengaluru, IN
• Karan Singh Bhatia · Plano, US
• Shailesh N. Joshi · Ann Arbor, US
• Indu Prathapan · Bengaluru, IN

Key dates

• Filing date: Dec 30, 2021
• Grant date: Jun 25, 2024
• Expiry date: Dec 30, 2041

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04B2001/6912
• WIPO field: Telecommunications
• WIPO sector: Electrical engineering

Abstract

A device comprises a digital ramp generator, an oscillator, a power amplifier, a low-noise amplifier (LNA), a mixer, and an intermediate frequency amplifier (IFA). The oscillator generates a chirp signal based on an output from the digital ramp generator. The power amplifier receives the chirp signal and outputs an amplified chirp signal to a transmitter antenna. The LNA receives a reflected chirp signal from a receiver antenna. The mixer receives output of the LNA and combines it with the chirp signal from the oscillator. The IFA receives the mixer output signal and includes a configurable high-pass filter, which has a first cutoff frequency during a first portion of the chirp signal and a second cutoff frequency during a second portion of the chirp signal. In some implementations, the first cutoff frequency is chosen based on a frequency of a blocker signal introduced by couplings between the transmitter and receiver antennas.