Patent ID: 9685932
Date: 2017-06-20
CPC Classifications: H01L,H03H

Claim:
1. An attenuator device comprising: a substrate that is coupled to a reference voltage; a first device formed in a first device region of the substrate wherein the first device region is surrounded by a first trench isolation structure; a second device formed in a second device region wherein the second device is surrounded by a second trench isolation structure; a third trench isolation region, the first and second device regions and the third trench isolation region are positioned to define a first and a second floating region of the substrate such that there is a first capacitance between the first device region and the first floating region and a second capacitance between the first floating region and the second floating region and a third capacitance between the second floating region and the second device region; wherein the first device has a first operating voltage and the second device has a second operating voltage and wherein the difference between the first and second operating voltages is less than the difference between the first operating voltage and the reference voltage.