Direct form active-R synthesis techniques and their critical assessment

1992

Active-R realization of current-mode highpass filters MASAMI HIGASHIMURAt Active-R filters have received much attention due to their potential advantages in terms of miniaturization, ease of design and high frequency performance. A realization of current-mode highpass transfer functions using the operational amplifier (op.-amp.) pole is proposed. Since the circuit is composed of only op.-amps and resistances, it is suitable for high frequency operation and monolithic IC implementation.

Section: Introductionmentioning

confidence: 96%

Brief communication Active-R realization of current-mode highpass filters

1992

“…Many circuits for realizing voltage-mode transfer functions using the op.-amp. pole have been published (Soderstrand 1976, Mitra and Aatre 1976, Nandi 1978, Siddiqi and Ahmed 1991. However, there are few circuits for realizing current-mode transfer functions using the op.-amp.…”

Section: Introductionmentioning

confidence: 98%

Current-mode lowpass and bandpass filters using the operational amplifier pole

1993

Brief communicationCurrent-mode lowpass and bandpass filters using the operational amplifier pole MASAMI HIGASHIMURAtThis paper proposes a circuit configuration for realizing current-mode lowpass and bandpass filters using the operational amplifier (op.-amp.) pole. The circuit simultaneously realizes lowpass and bandpass transfer functions using an op.-amp., three resistors and a capacitor. The effects of the parastic poles (i.e. second and third poles) of the op.-amp. on the gain of a lowpass filter are also presented. Since the circuit uses the op.-amp. pole, it is suitable for high frequency operation.

“…Many circuits for realizing voltage-mode transfer functions using the op.amp. pole have been published in the literature (Soderstrand 1976, Mitra andAatre 1976, Nandi 1978, Siddiqi andAhmed 1991 a, 1991 b). However, there is no circuit for realizing current-mode transfer functions using the op.-amp.…”

Section: Introductionmentioning

confidence: 99%

Brief communication Current-mode highpass and bandpass filters using the operational amplifier pole

1992

Brief communicationCurrent-mode highpass and bandpass filters using the operational amplifier pole MASAMI HIGASHIMURAtA circuit configuration for realizing current-mode highpass and bandpass filters using the operational amplifier (op.-amp.) pole is proposed. The circuit simultaneously realizes highpass and bandpass transfer functions using an op.-amp., two resistors and a capacitor. The effects of parastic poles (i.e. second and third poles) of the op.-amp. are also presented. Since the circuit uses an op.-amp. pole, it is suitable for high frequency operation.