US Patent Application 18361949. Circuits and Methods for a Noise Shaping Analog To Digital Converter simplified abstract

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Circuits and Methods for a Noise Shaping Analog To Digital Converter

Organization Name

Taiwan Semiconductor Manufacturing Company, Ltd.==Inventor(s)==

[[Category:Martin Kinyua of Cedar Park TX (US)]]

[[Category:Eric Soenen of Cedar Park TX (US)]]

Circuits and Methods for a Noise Shaping Analog To Digital Converter - A simplified explanation of the abstract

This abstract first appeared for US patent application 18361949 titled 'Circuits and Methods for a Noise Shaping Analog To Digital Converter

Simplified Explanation

This patent application describes systems and methods for analog-to-digital conversion (ADC).

  • The ADC includes a first quantization stage that samples an analog input signal and filters it with a noise-shaping transfer function to generate a first noise-shaped digital output.
  • The first quantization stage also generates a quantization error signal based on the comparison of the analog input signal and the first noise-shaped digital output.
  • The ADC further includes a voltage controlled oscillator (VCO)-based second quantization stage that samples the quantization error signal and filters it with a second noise-shaping transfer function to generate a second noise-shaped digital output.
  • A first digital filter filters the first noise-shaped digital output with an equivalent signal transfer function of the VCO-based second quantization stage to generate a first stage digital output.
  • A second digital filter filters the second noise-shaped digital output with the first noise-shaping transfer function to generate a second stage digital output with second order noise-shaping characteristics.
  • A combination circuit combines the first stage digital output and the second stage digital output to generate a digital ADC output signal with second order noise shaping characteristics.


Original Abstract Submitted

Systems and methods are provided for analog-to-digital conversion (ADC). A first quantization stage may be configured to receive an analog input signal and sample the analog input signal to generate a first digital signal, the first quantization stage may be further configured to filter the first digital signal with a first noise-shaping transfer function to generate a first noise-shaped digital output and to generate a quantization error signal based on a comparison of the analog input signal and the first noise-shaped digital output. A voltage controlled oscillator (VCO)-based second quantization stage may be configured to receive the quantization error signal and sample the quantization error signal to generate a second digital signal, the VCO-based second quantization stage may be further configured to filter the second digital signal with a second noise-shaping transfer function to generate a second noise-shaped digital output. A first digital filter may be configured to filter the first noise-shaped digital output with an equivalent signal transfer function of the VCO-based second quantization stage to generate a first stage digital output. A second digital filter may be configured to filter the second noise-shaped digital output with the first noise-shaping transfer function to generate a second stage digital output with second order noise-shaping characteristics A combination circuit may combine the first stage digital output and the second stage digital output to generate a digital ADC output signal with second order noise shaping characteristics.

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