Patent ID: 11892427
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Measurement (Instruments)
Classification: CPC G  H | IPC G  H

Claim 16:
17. A method for operating a bio-field effect transistor (bioFET) system, comprising:
receiving a first voltage signal applied to a first input of a bioFET;
outputting a current signal from the bioFET;
receiving the current signal from the bioFET at a second input of a current-to-time converter circuit;
converting the current signal to a time domain signal that is a pulse width signal that varies with respect to the current signal;
outputting a second voltage signal based on the current signal, wherein the second voltage signal increases during a charging phase and decreases during a discharging phase;
comparing the second voltage signal to a reference signal and providing a comparison output of the comparison of the second voltage signal and the reference signal; and
receiving the comparison output at one input of an AND gate and a first switch signal that is used to enter the discharging phase at another input of the AND gate to provide the time domain signal as the pulse width signal having a pulse width based on the comparison output and the first switch signal.