We propose an analog CMOS circuit for developing a biologically-inspired locomotion controller for a quadruped walking robot. The proposed circuit is based on the biological neural network, called the central pattern generator (CPG), that can generate rhythmic movements for locomotion of animals, such as walking, running, swimming, and flying. We constructed a CPG model from the WilsonCowan neu...

This paper presents a frequency modulation based readout circuit for the measurement of skin conductance or resistance. A charge pump based frequency-to-voltage converter circuit with adjustable sensitivity is used to convert the frequency shifts due to skin resistance changes into voltage variations. The readout circuit improves the measurement accuracy and artifact rejection in measurements o...

In this paper, design and analysis of a programmable CMOS-based function generator circuit is presented. The proposed circuit implements trapezoidal and triangular functions with all parameters (slope, position, width and height) independently and continuously adjustable. The proposed circuit achieves higher speed compared to the available previous work by not using winner takes all or looser t...

This paper describes the design of a bandgap reference, implemented in 0.50 μm CMOS technology. The circuit generates a reference voltage of 1.2218V. It can operate between 20oC & 70o C. Total variation of reference voltage within the temperature range is 2.6mV which is 0.213% of the reference voltage. This circuit works in a current feedback mode, and it generates its own reference current, re...

A new quadrature oscillator circuit using a single differential voltage current conveyor transconductance amplifier (DVCCTA) and four all grounded passive elements is presented. The proposed circuit provides two current quadrature outputs at high impedance and three voltage quadrature outputs simultaneously. The oscillation condition and oscillation frequency are independently controllable. The...

This work presents the implementation of multidimensional membership functions by means of an analogue Neuro-Fuzzy circuit realized in 0.8μm CMOS technology. The adopted circuit configuration is discussed and preliminary measurements of an integrated circuit prototype are reported. 1 Circuit implementation The fuzzy system model used in this work is based on the so-called fuzzy if-then rules [1...

We propose an architecture and circuit for temperature sensors integrated within systems on a chip. The circuit is based on special properties of devices when biased by a current with a particular dependence with temperature. We present results from a test circuit fabricated on a standard 0.8 μm CMOS technology which draws under 40 nA from a 1.6 V to 3.0 V supply at room temperature. Measuremen...

In this paper, the design of wireless sensor node is serial communication module with IEEE/ZigBee transmission module to replace the traditional, logistics collected data will be wirelessly sent. The GRPS communication circuit is mainly composed of a power supply circuit, GPRS module, SIM interface circuit and the serial interface circuit part. Its core is the GPRS module. The paper presents ap...

There are a lot of ways to achieve large current pulse power supply, and the more common way is to adopt the inverter switching circuit to achieve pulse power supply. The core of the NC power supply design of large current and wide frequency pulse in SEAM is using two-stage modulation. Combined with inverter technology, DC chopper technology and NC technology, it not only can achieve the adjust...