Synthesis of transfer functions using the operational amplifier pole

Srinivasan, S.

doi:10.1080/00207217608920538

Cited by 12 publications

(5 citation statements)

References 7 publications

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“…The single-pole model of an op.amp. leads to complex gain and the transfer function is given by (Srinivasan 1992)…”

Section: Circuit Analysis and Design Equationsmentioning

confidence: 99%

“…The circuit is realised using single pole (as "integrator") behaviour of an internally compensated operational amplifier (Huelsman 1971;Sun 1983;Mohan & Patil 1992;Shinde & Patil 2002). The filter without the capacitor is called an active-R filter; and has received much attention due to its potential advantages in terms of miniaturization, ease of design and high frequency performance (Srinivasan 1992;Kadam & Mahajan 1995;Shinde & Mirkute 2003). It has been also pointed out in the literature that active-R networks offer substantially low ω 0 sensitivity characteristics as compared to R-C active structures (Soderstand & Mitra 1971).…”

Section: Introductionmentioning

confidence: 99%

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A third-order active-R filter with feedforward input signal

Shinde

Patil²,

Mirkute

2003

Sadhana

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A realization of voltage-mode transfer functions with feedforward input signal for third-order active-R filter using an oprational amplifier has been presented. This filter is useful for high frequency operation, monolithic IC implementation and is easy to design. The single circuit gives three filter functions, low pass, high pass and band pass. This filter circuit can be used for different Q and f 0 with high passband gain. This gives better stop band attenuation and sharper cutoff at the edge of the passband.

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“…The single-pole model of an op.amp. leads to complex gain and the transfer function is given by (Srinivasan 1992)…”

Section: Circuit Analysis and Design Equationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A third-order active-R filter with feedforward input signal

Shinde

Patil²,

Mirkute

2003

Sadhana

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“…First, we consider the design of second-order band pass R-filter (stage 1) with resonant frequency of 10 KHz, 2 Q = and 6 …”

Section: Design Of Second-order Band-pass R-filter Networkmentioning

confidence: 99%

“…The building block of the R-filter is the internally compensated operational amplifiers (Op-Amps) [4] [5]. In addition to frequency stabilization by the R-filter network, it also has the potential advantages of miniaturization, ease of design and high frequency performance [6]- [8]. Active R-filters have been reported to be suitable for medium-Q high frequency applications [9].…”

mentioning

confidence: 99%

A Comparison of Higher-Order Active Band-Pass R-Filter Response with Equivalent Band-Pass RC-Filter Response at Varying Q-Factors

Amah¹,

Ahemen²,

Atsuwe³

2014

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In this paper a comparison of a sixth-order active band pass R-filter output response with the output response of a sixth-order band pass RC-filter at different quality factors (Q = 2, 5, 7, 8 and 10) was carried out at a fixed frequency of 10 KHz. The architecture used in the design is the multiple feedbacks for both filter networks. The simulated response characteristics show that both filters (R-and RC-filters) have their mid-band gains increasing with Q, while their bandwidths monotonically decreased with Q-values. The bandwidths are in the range of 22.23 dB to 62.97 dB and −55.49 dB to −50.81 dB (Q = 2 to 10) for R-and RC-filters respectively. At higher Q-values, R-filter showed better selectivity with a smaller bandwidth (400 Hz) at the edge of the pass band, when compared to 450 Hz for the RC-filter. The roll-off rate around −58.9 dB/decade for the R-filter appears to be that of a third-order filter response, while the RC-filter has its response in the range −106 to −132 dB/decade which is in the neighbourhood of an ideal sixth-order response (roll-off of 120 db/decade). A shift in the center frequency with Q was observed for the RC-filter only.

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“…The values of RC product determine the frequency responses of these circuits [1][2][3][4]. It is very difficult to make resistors and capacitors with the values and accuracy that are required in audio and instrumental applications.…”

Section: Introductionmentioning

confidence: 99%

Tunable Bandwidth Third Order Switched-Capacitor with Multiple Feedbacks Filter for Different Center Frequencies

Shinde¹,

Bhagat²

2010

ENG

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This paper proposes third order tunable bandwidth active Switched-Capacitor filter. The circuit consists of only op-amps and switched capacitors. The circuit is designed for circuit merit factor Q = 10. The proposed circuit implements three filter functions low pass, band pass and high pass simultaneously in single circuit. The filter circuit can be used for both narrow as well as for wide bandwidth. For various values of cut-off frequencies the behaviour of circuit is studied. The circuit works properly only for higher central frequencies, when f 0 > 10 kHz.

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Synthesis of transfer functions using the operational amplifier pole

Cited by 12 publications

References 7 publications

A third-order active-R filter with feedforward input signal

A third-order active-R filter with feedforward input signal

A Comparison of Higher-Order Active Band-Pass R-Filter Response with Equivalent Band-Pass RC-Filter Response at Varying Q-Factors

Tunable Bandwidth Third Order Switched-Capacitor with Multiple Feedbacks Filter for Different Center Frequencies

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