公开(公告)号：US20190199330A1

公开(公告)日：2019-06-27

申请号：US15853015

申请日：2017-12-22

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Aniruddha ROY ,  Nitin AGARWAL ,  Rajavelu THINAKARAN

IPC: H03K4/50 ,  H03K5/24

Abstract: Trimming components within an oscillator comprising: a trim-capable current source, wherein the trim-capable current source comprises a trimmable resistor and a trimmable current component, a comparator comprising a first input terminal that couples to the trim-capable current source and the second input terminal that couples to a reference voltage source, a switch coupled to the first input terminal and the trim-capable current source, and a trim-capable capacitor coupled to the switch, wherein the switch is coupled between the trim-capable capacitor and the trim-capable current source.

公开(公告)号：US20180284832A1

公开(公告)日：2018-10-04

申请号：US15473209

申请日：2017-03-29

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Nitin AGARWAL ,  Rajavelu THINAKARAN ,  Sumit DUBEY

IPC: G05F3/26 ,  H03K5/1252

CPC classification number: G05F3/262 ,  H03K5/1252

Abstract: At least some embodiments are directed to a system comprising a capacitor coupled to a voltage supply rail and configured to carry a capacitor current that comprises first and second parts. The capacitor current is an alternating current (AC). A first current mirror component may couple to the capacitor and to the voltage supply rail and is configured to carry the first part of the capacitor current. A second current mirror component couples to the voltage supply rail and is configured to carry the second part of the capacitor current. The second part of the capacitor current is proportionally related to the first part of the capacitor current. A circuit couples to the second current mirror component. The capacitor and the first and second current mirror components are configured to attenuate a common mode noise current flowing to the circuit.