Microchip Technology Inc.

Greenliant LLC

Fredrik Buch

Michael S Briner

Yong Yuenyongsgool

Cristian Albina

A lock-on detection circuit for a phase-locked loop includes circuitry configured to receive first up and down outputs and second up and down outputs from one or more phase detectors and to determine from the first up and down outputs and the second up and down outputs how well the phase-locked loop is locked on to a reference clock.

Phase lock loop lock indicator

A time domain voltage step down capacitor based circuit has an oscillating circuit for generating a clock signal. The circuit also has a capacitor based charge pump circuit for receiving the clock signal and an input voltage signal having an input current and generates an output voltage signal, less than the input voltage signal and an output current greater than the input current. The circuit further comprises a comparator circuit for receiving the output voltage signal, as a first input signal thereto, and a reference voltage signal as a second input signal thereto and compares the first input signal to the second input signal and generates a control signal in response thereto. Finally the control signal is supplied to the oscillating circuit to control the generating of the clock signal.

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Santa Clara, CA, United States of America

Fredrik Buch