Patent ID: 9136865
Filing Date: 2015-09-15
Classification: H03H,H03M

Abstract:
1. A circuit, comprising: a first digital filter having a z-domain transfer function H(z), the first digital filter being configured to generate a first output based on a digital input and a first digital output signal; a first digital modulator configured to generate the first digital output signal and a first error output based on the first output and a feedback error output; a gain block configured to amplify the first error output by a predetermined ratio k, thereby generating a second error output; a second digital modulator configured to generate a second output and a third error output based on the second error output; a second digital filter having a z-domain transfer function the second digital filter being configured to generate a second digital output signal based on the second output; and a third digital filter configured to generate the feedback error output based on the third error output.