An electronically tunable CMOS implementation of capacitance multiplier employing CCCDTA

Ozenli D., ALAYBEYOĞLU E.

AEU-INTERNATIONAL JOURNAL OF ELECTRONICS AND COMMUNICATIONS, vol.155, 2022 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 155
  • Publication Date: 2022
  • Doi Number: 10.1016/j.aeue.2022.154359
  • Journal Name: AEU-INTERNATIONAL JOURNAL OF ELECTRONICS AND COMMUNICATIONS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Applied Science & Technology Source, Compendex, Computer & Applied Sciences, INSPEC
  • Keywords: Biomedical applications, Capacitance multiplier, CCCDTA, CDU, DO-OTA, Monte -Carlo analysis, DIFFERENCING TRANSCONDUCTANCE AMPLIFIER, PASS FILTER, ARRAY
  • Istanbul Technical University Affiliated: No

Abstract

In this work, a new design for the grounded capacitance multiplier is proposed. The proposed circuit is based on the analog building block of Current Controlled Current Differencing Transconductance Amplifier (CCCDTA) which allows the multiplier structure to work in the current mode. CMOS realization of the proposed structure is implemented with 0.18 mu m CMOS technology for the grounded adjustable capacitor multiplier. Multiplication factor adjustability is realized by the bias current of Current Difference Unit (CDU) of CCCDTA. All simulations performed at post-layout level (209 mu m x 67 mu m) in Cadence environment by taking into account Monte-Carlo runs comprising process variations and transistor mismatches. Also, performance of the proposed multiplier structure is validated by using commercial elements such as AD844 and LM1370. In comparison to the counterparts in the literature, the proposed architecture including only single active element gives promising results under different operating conditions for a wide range of frequency.