Abstract: An oscillator circuit is disclosed. The oscillator circuit includes: oscillator transistors including gates; adjustment transistors coupled to the gates; a differential output coupled to the oscillator transistors; a switch configured to set an oscillation frequency of the differential output by driving: a first current including a first portion of a main current through at least one of the oscillator transistors; and a second current including a second portion of the main current through at least one of the adjustment transistors; a first set of auxiliary current sources configured to adjust a temperature coefficient of the oscillator circuit by driving a first set of auxiliary currents through the oscillator transistors; and a second set of auxiliary current sources configured to maintain the oscillation frequency of the differential output by driving, in response to driving the first set of auxiliary currents, a second set of auxiliary currents though the adjustment transistors.

Abstract: An oscillator circuit is disclosed. The oscillator circuit includes: oscillator transistors including gates; adjustment transistors coupled to the gates; a differential output coupled to the oscillator transistors; a switch configured to set an oscillation frequency of the differential output by driving: a first current including a first portion of a main current through at least one of the oscillator transistors; and a second current including a second portion of the main current through at least one of the adjustment transistors; a first set of auxiliary current sources configured to adjust a temperature coefficient of the oscillator circuit by driving a first set of auxiliary currents through the oscillator transistors; and a second set of auxiliary current sources configured to maintain the oscillation frequency of the differential output by driving, in response to driving the first set of auxiliary currents, a second set of auxiliary currents though the adjustment transistors.

Abstract: This disclosure generally provides embodiments to reduce the likelihood that an input device fails to detect an interfering signal when performing interference detection using interference bursts that are phase offset from sensor bursts used to perform capacitive sensing. In one embodiment, the input device adjusts the frequency of the interference bursts instead of using interference bursts with the same frequency. Doing so adjusts the phases of the interference bursts relative to each other such that even if one of the interference bursts is aligned with the interfering signal in a manner that the signal is not detected, an interference burst with a different frequency has a different alignment relative to the interfering signal. The measurements acquired by the differently aligned interference burst can be used to detect the presence of the interfering signal.

Abstract: This disclosure generally provides embodiments to reduce the likelihood that an input device fails to detect an interfering signal when performing interference detection using interference bursts that are phase offset from sensor bursts used to perform capacitive sensing. In one embodiment, the input device adjusts the frequency of the interference bursts instead of using interference bursts with the same frequency. Doing so adjusts the phases of the interference bursts relative to each other such that even if one of the interference bursts is aligned with the interfering signal in a manner that the signal is not detected, an interference burst with a different frequency has a different alignment relative to the interfering signal. The measurements acquired by the differently aligned interference burst can be used to detect the presence of the interfering signal.