Design of Second Order Lowpass and Bandpass Filter Using Single VDDDA and Its Modification as Sinusoidal Oscillator

Kulapong, Worawut; Siripongdee, Surapong; Jaikla, Winai

doi:10.1109/wsce49000.2019.9041006

Cited by 4 publications

(10 citation statements)

References 14 publications

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“…Table 1 compares the proposed universal biquad filter with previous biquad filters using the VDDDA [13][14][15][16][17][18][19][20][21][22][23][24]. These biquad filters are the multiple input multiple output (MIMO) [13,14,23], multiple input single output (MISO) [16,18,19,21,24] and single input multiple output (SIMO) [14,17,20,22] configurations. The design technique used in [13][14][15]17,[19][20][21][22] were based on two integrator loops, while the filters in [16,18,23,24] were based on a passive RLC circuit.…”

Section: Comparisonmentioning

confidence: 99%

“…Additionally, some VDDDA-based voltage-mode filters can cascade without the requirement of additional buffer devices. In this point of view, several active biquad filters using the VDDDA have been reported [13][14][15][16][17][18][19][20][21][22][23][24]. The voltage mode biquad filters using the voltage differential difference device (called the differential difference current conveyor transconductance amplifier (DDCCTA)) have been also proposed in references [25][26][27].…”

Section: Introductionmentioning

confidence: 99%

“…The voltage mode biquad filters using the voltage differential difference device (called the differential difference current conveyor transconductance amplifier (DDCCTA)) have been also proposed in references [25][26][27]. These biquad filters can be classified into two categories based on their design techniques, which are based on two integrator loops [13][14][15]17,[19][20][21][22]25,27] and based on a passive resistorinductor-capacitor (RLC) circuit [16,18,23,24,26]. The RLC based biquad filters proposed in [16,18,23,24] have very simple circuitry with a single VDDDA.…”

Section: Introductionmentioning

confidence: 99%

“…These biquad filters can be classified into two categories based on their design techniques, which are based on two integrator loops [13][14][15]17,[19][20][21][22]25,27] and based on a passive resistorinductor-capacitor (RLC) circuit [16,18,23,24,26]. The RLC based biquad filters proposed in [16,18,23,24] have very simple circuitry with a single VDDDA. However, these biquad filter realized from the RLC circuit have the following disadvantages: they consist of a floating capacitor [16,18,24,26], the natural frequency (f 0 ) and quality factor (Q) are not orthogonally controlled by changing the transconductance of the VDDDA [16,18,23,24], high impedance nodes at the input stage and a low impedance node at the output stage are not obtained [16,18,23,24,26] and additional circuits such as the unity gain inverting voltage amplifier or double-gain voltage amplifier are required for obtaining many filtering functions [16,18,24,26].…”

Section: Introductionmentioning

confidence: 99%

“…The RLC based biquad filters proposed in [16,18,23,24] have very simple circuitry with a single VDDDA. However, these biquad filter realized from the RLC circuit have the following disadvantages: they consist of a floating capacitor [16,18,24,26], the natural frequency (f 0 ) and quality factor (Q) are not orthogonally controlled by changing the transconductance of the VDDDA [16,18,23,24], high impedance nodes at the input stage and a low impedance node at the output stage are not obtained [16,18,23,24,26] and additional circuits such as the unity gain inverting voltage amplifier or double-gain voltage amplifier are required for obtaining many filtering functions [16,18,24,26]. Two-integrator loop-based biquad filters with high input impedance were obtained in references [13][14][15]17,[19][20][21][22]27].…”

Section: Introductionmentioning

confidence: 99%

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Universal Filter Based on Compact CMOS Structure of VDDDA

Jaikla

Khateb

Kulej

et al. 2021

Sensors

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This paper proposes the simulated and experimental results of a universal filter using the voltage differencing differential difference amplifier (VDDDA). Unlike the previous complementary metal oxide semiconductor (CMOS) structures of VDDDA that is present in the literature, the present one is compact and simple, owing to the employment of the multiple-input metal oxide semiconductor (MOS) transistor technique. The presented filter employs two VDDDAs, one resistor and two grounded capacitors, and it offers low-pass: LP, band-pass: BP, band-reject: BR, high-pass: HP and all-pass: AP responses with a unity passband voltage gain. The proposed universal voltage mode filter has high input impedances and low output impedance. The natural frequency and bandwidth are orthogonally controlled by using separated transconductance without affecting the passband voltage gain. For a BP filter, the root mean square (RMS) of the equivalent output noise is 46 µV, and the third intermodulation distortion (IMD3) is −49.5 dB for an input signal with a peak-to peak of 600 mV, which results in a dynamic range (DR) of 73.2 dB. The filter was designed and simulated in the Cadence environment using a 0.18-µm CMOS process from Taiwan semiconductor manufacturing company (TSMC). In addition, the experimental results were obtained by using the available commercial components LM13700 and AD830. The simulation results are in agreement with the experimental one that confirmed the advantages of the filter.

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