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Analog Design Services

An analog circuit is one that processes or produces analog signals. In an IC, an analog signal is a voltage or current which, within a certain limits, may have any amplitude value at any time. Both amplitude and time parameters are continuous. In contrast, a digital signal is defined with discrete amplitude value at distinct time.

Analog circuit design covers a very broad  range of functions. In general these will address the amplitude, frequency, or phase of the signals, and there are many generic functions that are needed in system design. These include basic circuit types such as single stage amplifiers, comparators, generators, filters, oscillators, multiplexers, and current to voltage converters. More complex functions may comprise collections of basic function, and examples of these would include  analog to digital converters, digital to digital converters, phase locked loops and synthesizers, mixers, and multi-stage amplifiers.

Many techniques and architectures are available to implement such functions, with one division of the basic techniques using a continuous time or a switched capacitor approach. The circuit appropriate to any given requirement will be dependent on many operational parameters such as nominal supply voltage range, temperature range, signal frequency range, function band-width, gain, accuracy, noise, slew rate, and transition time.

To take all of these variables into account, and to accommodate the variances in the operating voltage, temperature, and process corners requires considerable experience supported by first-class tools. These are available from matricus engineers, where the experience is not only the result of decades of working in the analog arena, but of successfully designing a wide range of functions for a broad spectrum of applications and specifications.

Simple lists of the function types developed by matricus do not do justice to that experience, however, the following is a short catalog of the circuits that the company designs on a regular basis:

 basic building blocks
 analog subsystems
 differential amplifiers
 analog to digital converters
 voltage and current generators
 digital to analog converters
 analog counters
 radio transceivers
 band-gap circuits
 silicon defined radios
 PTAT circuits
 signal processing blocks
 comparators delta-sigma modulators
 stable oscillators phase locked loops
 single pole filters data transceivers such as USB
 sensor interfaces
 complex function filters
 power on reset
 audio signal processing

matricus offers design services that cover all of the above designs and far more. The service includes generation of a Specification, if required, through to delivery of a completed design database targeting a defined technology. A design report will include simulation results that demonstrate the achievement of Specification items.

A special category of analog design is that or rf design. Although rf functionality can involve frequencies lower than even 1MHz,  rf design is a descriptor normally associated with circuits whose frequencies are greater than 500MHz and could range up to 100GHz. The issues associated with rf design and signal handling and the techniques and tools used are often quite different from circuits at lower frequencies. More information on matricus' expertise in this subject is discussed under rf Circuit Design



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