Patent ID: 8681030

Claim:
An integrated circuit device for digitizing an RF signal comprising: an integrated circuit die having a rectangular shape; a plurality of LC resonators constituting a bandpass filter configured to receive the error signal and a first digital-to-analog signal to produce an amplified error signal; a summer receiving an RF signal and a second digital-to-analog signal to produce an error signal; a analog-to-digital converter configured to receive the amplified error signal to produce a quantized RF signal; a digital-to-analog converter configured to receive the quantized RF signal to generate a first digital-to-analog signal and a second digital-to-analog signal; wherein there are at least two LC resonators and at most four LC resonators; each LC resonator comprises a U-shaped inductor, constructed from a conductive metal layer on the integrated circuit die; a first and second U-shaped inductors are aligned along a horizontal axis centered approximately on the integrated circuit die, with the rounded tip of the first U-shaped inductor facing outward to the first edge of the integrated die, and the rounded tip of the second U-shaped inductor facing outward to the second edge of the integrated die, which is opposite to the first edge of the integrated die; the centers of the rounded tips of the first and second U-shaped inductors are electrically connected to a constant potential; a first capacitor is coupled across the gaps at the two ends of the first U-shaped inductor; and a second capacitors is coupled across the gaps at the two ends of the second U-shaped inductor.