Ultrasound Needle Guidance System for Precision Vaccinations and Drug Deliver
Semih Aslan, Mahbubur Rahman, Sourav Das, Bonnie Schnitta

Circuits Syst. Vol.12 No.1, January 29, 2021
DOI: 10.4236/cs.2021.121001

Noise Reduction for Digital Communications—The Masterpiece, a Modified Costas Loop
János Ladvánszky

Circuits Syst. Vol.11 No.6, June 28, 2020
DOI: 10.4236/cs.2020.116006

Tunable Floating Resistor Based on Current Inverting Differential Input Transconductance Amplifier
Zainab Haseeb, Dinesh Prasad, Mainuddin  , M. W. Akram

Circuits Syst. Vol.11 No.5, May 29, 2020
DOI: 10.4236/cs.2020.115005

CMOS Realization of VDVTA and OTA Based Fully Electronically Tunable First Order All Pass Filter with Optimum Linearity at Low Supply Voltage ± 0.85 V
Ghanshyam Singh

Circuits Syst. Vol.11 No.4, April 30, 2020
DOI: 10.4236/cs.2020.114004

A High-Speed DLL-Based Hybrid Phase Conjugator for 5G Beamforming
Michael Bolt, Mark Adams

Circuits Syst. Vol.11 No.3, March 31, 2020
DOI: 10.4236/cs.2020.113003