Patent ID: 8729969
Filing Date: 2014-05-20
Classification: H03K,H03L

Abstract:
1. An oscillation circuit, comprising: a threshold voltage extraction module, a positive temperature coefficient voltage generation circuit, an addition module connected with said threshold voltage extraction module and said positive temperature coefficient voltage generation circuit, a common-source amplifier module connected with said addition module, a charge and discharge module connected with said common-source amplifier module, and a clock output module connected with said charge and discharge module, wherein said common-source amplifier module comprises a first field effect transistor (FET), and a second FET connected with said first FET, said addition module comprises a first operational amplifier connected with said threshold voltage extraction module, a second operational amplifier connected with said positive temperature coefficient voltage generation module, a third FET connected with said first operational amplifier, a fourth FET connected with said first operational amplifier, a fifth FET connected with said second operational amplifier, a sixth FET connected with said second operational amplifier, a first resistor connected with said third FET, a second resistor connected with said fifth FET, and a third resistor connected with said sixth FET, said charge and discharge module comprises a seventh FET connected with said first FET, an eighth FET connected with said second FET, a charge and discharge FET for charging and discharging, a first switch connected between said seventh FET and said charge and discharge FET, a second FET connected between said seventh FET and said eighth FET, a first comparator connected with said first switch, a second comparator connected with said first comparator, a first nor gate connected with said first comparator, and a second nor gate connected with said second comparator.