Intel Corporation

Tsung-Yuan Tony Chang

Waleed Khalil

Bobby B Nikjou

Tseng-Yeng Robin Lo

A time to digital converter includes a mutual exclusion element and a sampling component. The mutual exclusion element is configured to receive a first clock and a second clock and to generate a first pulse and a second pulse. The mutual exclusion element is configured to drive the first pulse to a first logic state and the second pulse to a second logic state upon the first clock being earlier than the second clock and drive the second pulse to the first logic state and the first pulse to the second logic state upon the second clock being earlier than the first clock. The sampling component is configured to receive the first pulse and the second pulse and to generate a decision signal according to the first pulse and the second pulse.

Bang-bang time to digital converter systems and methods

Some embodiments of the present invention include a circuit in a wireless transmitter or other apparatus is automatically calibrated using a calibration circuit to accommodate provide a desired characteristic such as a filter response, where the component values of the filter circuit may vary such as in an integrated circuit. In one embodiment, the calibration circuit is coupled to one or more adjustable capacitors in the filter circuit to select a capacitor value so that the filter circuit exhibits the desired filter response. In one particular embodiment, the adjustable capacitor is charged in an RC circuit for each clock cycle at power up. The value of the adjustable capacitor is changed for each clock cycle until the capacitor charges to a level greater than or equal to predetermined reference voltage. When the capacitor is charged to a predetermined reference voltage, a desired capacitance value is indicated, and the adjustable capacitor is maintained at the desired capacitance value to provide the desired filter output. The calibration circuit causes the circuit to be self-calibrating to the desired characteristic such as a desired filter response. Other embodiments are described and claimed.

Growing community of inventors

Chandler, AZ, United States of America

Tsung-Yuan Tony Chang