The Differential Difference Operational Floating Amplifier: A New Block For Analog Signal Processing - Circuits and Systems II: Analog and Digital Signal Processing, IEEE Transactions on
نویسندگان
چکیده
A wide-range differential difference operational floating amplifier (DDOFA) is introduced. The DDOFA is a new block useful for continuous-time analog signal processing. The DDOFA is realized using a differential difference transconductor with large signal handling capability and a single input differential output current op-amp. The DDOFA forces two differential voltages to the same value and provides two balanced output currents. This brief presents a CMOS realization of the DDOFA, and some of its applications are provided, such as a voltage-to-current converter, MOS-grounded and floating resistors, a MOS multiplier/divider cell, a differential integrator, a continuoustime MOS-C filter, a MOS-C current oscillator, and a MOS-C floating inductor. Simulation results for the DDOFA circuit and its applications are given.
منابع مشابه
Generation of Current Conveyor-Based All-Pass Filters from Op Amp-Based Circuits [Transaction Briefs - Circuits and Systems II: Analog and Digital Signal Processing, IEEE Transactions on
In this brief, it is shown that two of the recently reported voltage mode and current mode current conveyor-based all-pass circuits can be generated from the well known single input op amp all-pass configuration. It is also found that two other voltage mode current conveyor-based all-pass circuits are related directly to the differential input op amp all-pass structure. Several new grounded cap...
متن کاملImproving adaptive resolution of analog to digital converters using least squares mean method
This paper presents an adaptive digital resolution improvement method for extrapolating and recursive analog-to-digital converters (ADCs). The presented adaptively enhanced ADC (AE-ADC) digitally estimates the digital equivalent of the input signal by utilizing an adaptive digital filter (ADF). The least mean squares (LMS) algorithm also determines the coefficients of the ADF block. In this sch...
متن کاملCascaded Complex ADCs With Adaptive Digital Calibration for I/Q Mismatch
A complex analog-to-digital converter (ADC) intended for digital intermediate frequency (IF) receiver applications digitizes analog signals at IFs with excellent power/bandwidth efficiency. However, it is vulnerable to mismatches between its in-phase and quadrature paths that can dramatically degrade its performance. The proposed solution mitigates mismatch effects using a complex sigma-delta (...
متن کاملModeling and Simulation of Substrate Noise in Mixed-Signal Circuits Applied to a Special VCO
The mixed-signal circuits with both analog and digital blocks on a single chip have wide applications in communication and RF circuits. Integrating these two blocks can cause serious problems especially in applications requiring fast digital circuits and high performance analog blocks. Fast switching in digital blocks generates a noise which can be introduced to analog circuits by the common su...
متن کاملField-Programmable Analog Arrays: A Floating-Gate Approach
Floating-gate analog circuits are being used to implement advanced signal processing functions and are very useful for processing analog signals prior to analog to digital conversion. We present an architecture analogous to FPGA architectures for rapid prototyping of analog signal processing systems. These systems go beyond simple programmable amplifiers and filters to include programmable and ...
متن کامل