Samsung patents filter design to improve signal processing in chips
Samsung has been granted a patent for a specific electronic circuit design used in analog-to-digital converters. The invention uses a cross-coupled structure to process in-phase and quadrature signals, which helps clean up data before it is converted into digital form.
In the filing’s own words
Disclosed is a loop filter, comprising, a first single-amplifier biquad (SAB) integrator configured to apply an integration operation to an in-phase (I) input signal; a second SAB integrator configured to apply an integration operation to a quadrature (Q) input signal; a first cross-coupled path between an output terminal of the first SAB integrator and an input side of the second SAB integrator and configured to apply a first gain to an output voltage of the first SAB integrator; and a second cross-coupled path between an output terminal of the second SAB integrator and an input side of the first SAB integrator and configured to apply a negative of the first gain to an output voltage of the second SAB integrator.
What exactly they claim (claim 1)
1. A loop filter, comprising: a first single-amplifier biquad (SAB) integrator configured to apply an integration operation to an in-phase (I) input signal; a second SAB integrator configured to apply an integration operation to a quadrature (Q) input signal; a first cross-coupled path between an output terminal of the first SAB integrator and an input side of the second SAB integrator and configured to apply a first gain to an output voltage of the first SAB integrator; and a second cross-coupled path between an output terminal of the second SAB integrator and an input side of the first SAB integrator and configured to apply a negative of the first gain to an output voltage of the second SAB integrator, wherein at least one of the first SAB integrator or the second SAB integrator includes a self-feedback path of a second gain for providing at least one pole to a transfer function of the loop filter, wherein each of the first SAB integrator and the second SAB integrator comprises one operational amplifier, and wherein an output voltage of each one operational amplifier of the first SAB integrator and the second SAB integrator is configured to be fed back to an input of the each one operational amplifier of the first SAB integrator and the second SAB integrator via an inverting circuit, a ‘−1’ gain resistor, and a ‘−1’ gain capacitor, the inverting circuit representing a ‘−1’ operator.
Facts
- Company
- Samsung (SAMSUNG ELECTRONICS CO., LTD.)
- Official title
- SAB based loop filter with cross-coupled structure and ADC including the same
- Patent number
- US12738956B2
- Application number
- 18739534
- Filed
- Jun 11, 2024
- Granted
- Sep 15, 2026
- Inventors
- 2
- Claims
- 19
Classified under
H03M 3/458 Electricity & electronicsH03M 3/39 Electricity & electronicsMore from Samsung in Chips & hardware
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Summaries are simplified from the filing’s own abstract and first claim. A patent filing is not a product announcement.
Patent data and drawings: U.S. Patent and Trademark Office (USPTO). Nebula is not affiliated with or endorsed by the USPTO.