0.5 V Fully Differential Universal Filter Based on Multiple Input OTAs
Autor: | Rajeev Kumar Ranjan, Winai Jaikla, Tomasz Kulej, Fabian Khateb, Montree Kumngern, Peerawut Suwanjan |
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Rok vydání: | 2020 |
Předmět: |
MI-OTA
General Computer Science Transconductance 02 engineering and technology Topology law.invention Band-pass filter law 0202 electrical engineering electronic engineering information engineering low-power low-voltage circuit General Materials Science Digital biquad filter Physics Amplifier analog circuit 020208 electrical & electronic engineering General Engineering 020206 networking & telecommunications Filter (signal processing) Capacitor electronic control lcsh:Electrical engineering. Electronics. Nuclear engineering universal filter Resistor lcsh:TK1-9971 Intermodulation |
Zdroj: | IEEE Access. 2020, vol. 8, issue 1, p. 187832-187839. IEEE Access, Vol 8, Pp 187832-187839 (2020) |
ISSN: | 2169-3536 |
Popis: | The design of a low-power, low-voltage, fully-differential universal biquad filter is presented in this work, which is constructed from four multiple-input gate-driven operational transconductance amplifiers (MI-OTAs) along with one passive resistor and two passive capacitors. The scheme of presented biquad filter has three high-input impedance voltage nodes and single output voltage node. Five unity gain filtering functions, all-pass (AP), low-pass (LP), band-pass (BP), high-pass (HP) and band-stop (BS) responses, are obtained. The selection of output filtering responses is obtained without the need of component matching condition, inverting or double input voltage. With this feature, it can be easily controlled with digital programming. The quality factor (Q) and angular frequency ( $\omega _{0}$ ) are electronically and independently tuned. Moreover, the adjustment of $\omega _{0}$ and Q can be done without affecting the voltage gain. A workability of the design is confirmed via Cadence software and the Spectre simulator based on the 180 nm TSMC CMOS technology parameters. The proposed fully differential filter operates with 0.5 V supply voltage. The results verify that the proposed filter dissipates the total power of 53.3 nW. Additionally, the dynamic range (DR) of band-pass filtering function is 63 dB for 2% third intermodulation distortion (IMD). Also, the simulated RMS value of the band-pass filtering noise is $45~\mu \text{V}$ . |
Databáze: | OpenAIRE |
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