Generation of Continuous - Time Two Integrator Loop OTA Filter Structures
نویسندگان
چکیده
Abstruct -Generation of two integer loop filter structures using operational Transconductance Amplifiers (OTA's) and Capicitors (TAC) is presented. A direct block diagram approach is employed to generate the TAC filter structures. The basic filter building blocks consist of a lossless integrator, lossy integrators and three types of summers. They are implemented using OTA's as the active components. The resulting TAC second-order filter structures, some previously reported and other new structures, are orderly generated. It is shown that the selection of the best structure depends upon the particular application or design specifications. The generated TAC biquadratic structures are very suitable for monolithic filters since typically only OTA's and two capacitors are needed. A TAC filter structure homologous to the conventional KHN op amp filter structure is presented. Programmability of op,Qp and voltage gain is considered.
منابع مشابه
Minimum Component M.ultiple Integrator Loop OTA-Grounded Capacitor All-Pole Filters
This paper addresses multiple loop feedback minimum component OTA-grounded capacitor all-pole filters. A general theory and its formulation are presented. It is shown that many new interesting configurations can be produced, all popular approximations including the Butterworth and Chebyshev characteristics are realizable and some known typical structures are also derivable from the method. The ...
متن کاملDesign of Gate-Driven Quasi Floating Bulk OTA-Based Gm–C Filter for PLL Applications
The advancement in the integrated circuit design has developed the demand for low voltage portable analog devices in the market. This demand has increased the requirement of the low-power RF transceiver. A low-power phase lock loop (PLL) is always desirable to fulfill the need for a low power RF transceiver. This paper deals with the designing of the low power transconductance- capacitance (Gm-...
متن کاملPerformance Comparison of Continuous-Time IFLF and LF Low-Pass All-Pole OTA-C Filters
This paper presents the performance comparison of two typical multiple loop feedback all-pole operational transconductance amplifier-capacitor (OTA-C) filters: Inverse-follow-the-leader-feedback (IFLF) and Leapfrog (LF) filters. Two fourth-order structures are analysed and compared in terms of sensitivity, maximum input signal, noise, and OTA nonideality effects on magnitude response. Simulatio...
متن کاملStructure Generation and Design of Multiple Loop Feedback OTA-Grounded Capacitor Filters - Circuits and Systems I: Fundamental Theory and Applications, IEEE Transactions on
This paper addresses the structure generation, analysis and synthesis of multiple loop feedback OTA-C filters. A systematic approach is proposed for all-pole filters, and the generation and design of minimum component structures are extensively exemplified. Two general methods for transmission zero realization are also suggested and two architectures with simple design formulas are illustrated....
متن کاملContinuous-Time ΣΔ ADC with Implicit Variable Gain Amplifier for CMOS Image Sensor
This paper presents a column-parallel continuous-time sigma delta (CTSD) ADC for mega-pixel resolution CMOS image sensor (CIS). The sigma delta modulator is implemented with a 2nd order resistor/capacitor-based loop filter. The first integrator uses a conventional operational transconductance amplifier (OTA), for the concern of a high power noise rejection. The second integrator is realized wit...
متن کامل