A linear high gain time difference amplifier using feedback gain control
- Resource Type
- Conference
- Authors
- Wu, Wenlan; Baker, R. Jacob; Bikkina, Phaneendra; Garcia, Fred; Mikkola, Esko
- Source
- 2016 IEEE Dallas Circuits and Systems Conference (DCAS) Circuits and Systems Conference (DCAS), 2016 IEEE Dallas. :1-4 Oct, 2016
- Subject
- Components, Circuits, Devices and Systems
Computing and Processing
Power, Energy and Industry Applications
Robotics and Control Systems
Signal Processing and Analysis
Generators
Logic gates
Capacitors
Tin
Linearity
Delays
Inverters
Feedback
Time difference amplifier
Gain control
- Language
This paper describes a feedback time difference amplifier (FTDA) with good linearity and high gain for coarse-fine time-to-digital converters. The symmetrical FTDA has two identical output generators. Each one consists of one SR-latch, one XOR gate, one buffer and two feedback P-type keepers. The improvement in linearity and time difference gain is achieved with two feedback paths based on meta-stability of the SR-latch. Its validity was demonstrated using 130nm CMOS technology. The power consumption is 91.54uW for the highest gain at 2MHz input signals. The gain can be controlled from 25.06 to 734.9 with a ±20ps input time interval.