A New VGA Circuit Using a Feedback Structure in 0,35μm CMOS Technology

Kalkışım E. S., Yazgı M., Aktaş M.

14th International Conference on Electrical and Electronics Engineering, ELECO 2023, Virtual, Bursa, Türkiye, 30 Kasım - 02 Aralık 2023, (Tam Metin Bildiri) identifier

  • Yayın Türü: Bildiri / Tam Metin Bildiri
  • Doi Numarası: 10.1109/eleco60389.2023.10416012
  • Basıldığı Şehir: Virtual, Bursa
  • Basıldığı Ülke: Türkiye
  • Samsun Üniversitesi Adresli: Hayır

Özet

In this work, a new structure to design variable gain amplifier (VGA) circuit is presented. The VGA circuit has been designed in 0.35μm CMOS technology. The VGA circuit employs a pseudo-exponential function. The VGA circuit works in voltage mode. The VGA circuit has a negative feedback structure and it has no stability problem because the magnitude of the loop gain is less than 1 for low frequencies. With respect to simulations, the VGA circuit has a gain range of 27dB between -13dB and +14dB, bandwidth performance of 200MHz for the maximum gain, and power consumption of approximately 1.3mW.