Signal Processing Group Inc, is, and has been located in Chandler, Arizona ( a suburb of Phoenix since February 1988. Our business is providing a capability for analog/RF and mixed signal integrated circuits, wireless ASICs and modules and pcb based analog/wireless products. Please use this form to register with SPG to receive free items. By registering you are formally allowing us to send you information. You can opt out at any time if you so wish.

Free reports

A brokaw voltage reference design

A CMOS 4 bit synchronous counter

Sigma - delta oversampled converter

Convert LC prototype filters to active integrator filters

An EXCEL template for small pcb loop antennas.

Design considerations for a high speed

current source digital to analog converter

A study of frequency modulated signals and simulation techniques.

Voltage and current balun techniques.

Tutorial paper on CRC encoding for error control in data communication systems

A white paper on Multirate sampling in digital circuits and systems.

Accurate formulas for calculating the equivalent circuit of right angle bends in microstrip.

The relationship between bandpass filter response, gain and bandwidth of operational amplifiers.

Inductance, mutual inductance and associated models for bond wires

A calculator for the fusing current of bond wires

An analysis of qpsk operation using graphical techniques

A description of phase noise and jitter in oscillators and their causes.

Equivalency of series and parallel form of circuits.

A tutorial on Power Spectral Density.

EXCEL file for the schmitt trigger oscillator.

Antenna specifications and brief descriptions.

RF Amplifier specifications and brief descriptions.

An effective PCB permittivity calculator for antenna design

This report describes the issues of image frequency in radio receivers

This report describes the image reject mixer

Impedance matching simulations using PSPICE

Coplanar waveguide design and analysis

A calculator for the flicker noise in MOSFETs

An EXCEL file with the data for the analysis of microstrip characteristic impedance

A calculator for the rms jitter from measured phase noise

A floating bipolar current source circuit

A temperature stable/independent bipolar current source circuit

A calculator for the width of a PCB with a given current through it.

Introduction to design of a Wilkinson divider/combiner

QPSK unit waveforms for constructing the QPSK composite signal

QPSK coherent demodulation technique

Analytical expressions for PLL acquisition behavior

A VCO behavioral model using PSPSICE ABM

The RF power amplifier RAPP model

A linear PLL model: Using PSPICE ABM simulation

Basics of a parabolic reflector antenna

Basics of a rectangular microstrip patch antenna

Convert a complex number from rectangular to polar format

Calculate TIN using s-parameters ( modified input reflection coefficient)

Calculate TOUT using s-parameters ( modified output reflection coefficient)

Calulator for the flicker noise of a MOSFET

Calulator for conversion of noise figure and noise temperature

Microwave amplifier single stage gains

Microwave amplifier single stage gain javascript calculator

Derivation of the equivalent noise resistance of the bipolar

Equivlent circuit of the rf transformer

A calculator for the LC balun component values

The t - pad attenuator lossless components design The t - pad attenuator javascript file for calculating the impedances. The t - pad equations derived from first principles Calculating reistors for unequal I/O impedances for a t-pad The t - pad equations derived from first principles Calculating resistors for unequal I/O impedances for a t-pad Pi sysmmetric attenuator Pi sysmmetric attenuator resistor calculator Pi asysmmetric attenuator Pi asysmmetric attenuator resistor calculator Bridged T symmetric attenuator Bridged T symmetric attenuator resistor calculator Delta Sigma modulator parameter estimator I javascript for calculating the impulse response of a windowed sinc filter Half band filter article Understanding the stability circle Designing a CIC filter for decimation Antenna test for fast characterization and sorting Antenna specifications Measureloss using a directional coupler. Design of a small loop antenna on a pcb. The basics of s-parameters. Touchstone file for use in RF, microwave and mmWave design. An analysis of the requirements for a charge pump PLL. An assessment of the circuit, size, power, technology and cost of a fast current source digital to analog converter. An assessment of the circuit, size, power, technology and techniques for an all digital pll. A cheatsheet for complex and absolute numbers. Understanding the phase margin of operational amplifiers. More free reports and articles...