Abstract: An embodiment of the present invention is a technique for timing recovery. A frequency acquisition loop locks a voltage controlled oscillator (VCO) clock of a multi-band VCO to a reference clock. The frequency acquisition loop generates first and second feedback clocks from the VCO clock. A data lock phase loop generates a driving signal corresponding to a phase error signal from interleaved partial response signal (PRS) samples based on the second feedback clock. The driving signal controls the multi-band VCO in a data phase lock mode. A lock detect controller detects a frequency lock condition in a frequency lock mode and a data lock condition in the data phase lock mode based on the first feedback clock and the reference clock.

Abstract: An embodiment of the present invention is a technique for timing recovery. A frequency acquisition loop locks a voltage controlled oscillator (VCO) clock of a multi-band VCO to a reference clock. The frequency acquisition loop generates first and second feedback clocks from the VCO clock. A data lock phase loop generates a driving signal corresponding to a phase error signal from interleaved partial response signal (PRS) samples based on the second feedback clock. The driving signal controls the multi-band VCO in a data phase lock mode. A lock detect controller detects a frequency lock condition in a frequency lock mode and a data lock condition in the data phase lock mode based on the first feedback clock and the reference clock.

Abstract: The present invention provides an active inductor apparatus and system, having a variable frequency response through inductance adjustment. The active inductor apparatus comprises a variable resistive element and a variable gain element, and the system further comprises an inductance controller and a gain controller. The variable resistive element has a first terminal and a second terminal, with the second terminal capable of receiving a first adjustment signal. The inductance controller is capable of providing the first adjustment signal to control and adjust a resistance level of the variable resistive element. The variable gain element has a third terminal capable of receiving a second adjustment signal. The gain controller is capable of providing the second adjustment signal to control and adjust a transconductance of the variable gain element.