Transcript OctoberBest Quick Analog Design Presentation
Are there analog challenges in your next design that you haven’t discovered yet ?
You ?
Use Anadigm Programmable Analog Signal Processing Technology to:
Simplify Your Analog Design Cycles
Adapt Your Design Using Software Tools Instead of a Soldering Iron
Add New Features and Capabilities to Your Product After the Circuit Board Is Finished
Anadigm’s
Programmable Analog Signal Processing Technology Delivers Accuracy and Stability:
Achieve 0.1% functional accuracy
Chip to chip accuracy
±
0.1%
Drift free performance immune to process variation, operating temperature and aging
The CAD Tools
Overview
AnadigmDesigner2
Easy-to-Use
Standard Windows based icon drag-and-drop user interface
Built-in SPICE based discrete time circuit simulator
Built-in signal generator and oscilloscope
Available FREE from Anadigm website (www.anadigm.com)
Supports the selection, configuration and interconnect of Configurable Analog Modules (CAM)
Configurable Analog Modules (CAM)
A CAM is an analog signal processing function abstracted in software accessed by an icon A large library of standard function CAMs is included A circuit is implemented simply by selecting, configuring, and wiring CAMs in the design space Each CAM has a user interface to configure options and limits Each CAM has an accurate functional model for use with the internal SPICE simulator
Typical CAM Dialog Window to Select Values
Clock and name
Radio buttons Parameter entry area
Partial Library of Available CAMs •Differential Comparator •Inverting Differentiator •Divider •Bilinear Filter •Biquadratic Filter •Half cycle gain stage •Half Cycle Sum/Difference Stage •DC Voltage Source •Gain Stage with Output Voltage Limiting •Gain Stage with Switchable Inputs •Half Cycle Inverting Gain Stage (optional hold) •Half Cycle Inverting Rectifier (optional hold) •Half Cycle Rectifier •Gain Stage with Polarity control •Integrator •Inverting Gain Stage •Inverting Sum Stage •Multiplier •Rectifier with Low Pass Filter •Sample and Hold •Sinewave Oscillator •Transimpedance Amplifier •User-defined Voltage Transfer Function •Arbitrary Periodic Waveform Generator •Sum/Difference Stage with Low Pass filter •Analog to Digital Converter (SAR) •Voltage-controlled Variable Gain Stage •Low Corner Frequency Bilinear Low-Pass Filter •Sum/Difference Integrator •Square Root
Connect Multiple CAMs to Build Complex Functions High Pass Filter Half-Wave Rectifier Low Pass Filter Inverting Gain Comparator w/ Ref
Simulator
AnadigmFilter Tool
AnadigmFilter - It builds the circuit for you.
AnadigmFilter Tool
Typical Applications
Complex analog filtering circuits
Guaranteed and repeatable filter implementation
Implemented filter is drift-free and immune to aging or component variations
Make tunable (adaptable) filters within minutes Sensor signal conditioning
Gain, offset correction, linearization, etc.
Stable and adaptable sensor stimulus Correct / adjust for aging, drift, manufacturing variability, etc.
Improve accuracy, performance and control by providing real time adjustments to range of operation Closed loop control systems
Proportional-Integral-Derivative (PID) controllers implemented within minutes
Low latency control loop
Summary
Simplify Your Analog Design
Reduce design time
Save engineering costs
Gain the Flexibility to Adapt Your Design
Easily address unknown/unforeseen design issues Quickly modify circuits when specifications change Board spins are replaced with software changes This flexibility can extend all the way to your customer’s site One PCB can serve many products
Everything shown in this presentation runs on the Servenger Programmable Analog Module (PAM)
Anadigm on a circuit board with clock, power supplies, connectors and input & output buffers.
Serial port connection to AnadigmDesigner2 Accepts differential or single ended inputs with selectable input impedances Input and output signals are referenced to GND.
Stores downloads from AD2 in the on-board EEPROM for the “run from EEPROM” mode (don’t need to own a separate PROM burner)
Exercise: Build a Circuit that Filters and Rectifies a Signal
Circuit will take a square wave input and output a bandpass filtered version of the signal and then a rectified version of the filtered signal
This is a basic circuit that will show:
The frequency components of the square wave
The average DC value of the extracted component
Step 1: Set up a Biquadratic Band Pass Filter Open AnadigmDesigner2. Click on the green box to pop up the CAM selection window
Step 2: Place Biquadratic Filter in Chip Work Space Choose (double Click) from the list of CAMs a “FilterBiquad” Filter. (this is a two pole pole Filter) and set the dialog parameters as shown on the next page
Step 3: Set Biquadratic CAM parameters Step 1: set the Clock to 2000 kHz by moving the spinners Step 3: Set Corner Frequency to 5 KHz, gain to 1.0 and Q to 15 Step 2: Select Band pass filter by clicking on the band pass radio button Step 4: Click on OK to accept parameters
Step 4: Place a “RectifierFilter” CAM in the Work Space Choose (double Click) from the list of CAMs a “RectifierFilter” CAM. This is a rectifier with a combined single pole low pass filter.
The combination of the filter and rectifier uses the same number of op amps as a rectifier alone eliminating the need for a separate filter.
Please set parameters as shown on the next page
Step 5: Set parameters for the “RectifierFilter” Step 1: set the Clock to 2000 kHz by moving the spinners Step 4: Click on OK to accept parameters Step 2: Choose a non inverting Full wave rectifier. Note the other choices for future reference Step 3: Set Corner frequency to 100 KHz and gain to 1. Why 100 KHz? It lets through almost all the energy from the square wave, but blocks higher harmonics that may alias back
Step 6: Add an External Signal Generator Add a signal Generator by clicking on the sine wave on the tool bar and then place the signal generator here Next….
Double click on the signal generator to pop up the configuration window on the next page
Step 7: Configure signal generator And set Parameters as shown to create a 5Khz square wave Next….wire the circuit up
Step 8: Wire up the circuit 1) Wire it up!
Just drag the mouse over to the contact or wire that you want to wire up 2) A wire tool graphic will appear and the contact will high light 3) Next, click the left mouse button Next….. Place oscilloscope probes
Step 9: Place Oscilloscope Probes 2) Place Probes 1) Depress the probe tool icon on the tool bar (to the right of the sine wave) Drag it near a contact and when the contact high lights, depress the left mouse button 3) Maintain the probe colors as shown in the picture so you can follow along Next…..
Configure the Simulator
Step 10: Configure the Circuit Simulator
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Configure the simulator Click on the ‘Simulate’ tab on the tool bar and then choose the selection ‘Setup Simulation’
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Configure the options as shown Next…..
Run the simulator
Step 11: Run the Simulator Depress the “Sim” icon to run. Set time parameters as shown (in red).
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Extracted Fundamental of Square Wave
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Rectified Fundamental
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Input Square Wave 5Khz
Continuing the Exercises:
Change to a bandstop filter to block rather than pass the fundamental frequency
Simulate to see what a square wave looks like with its first harmonic blocked!
Obtain average DC value of the rectified signal
Exercise: Set Biquadratic CAM parameters Step 1: set the Clock to 2000 kHz by moving the spinners (it should already be like this) Step 3: Set Corner Frequency to 5 KHz, DC gain to 1.0 and Q to 15 and HF Gain to 1 Step 2: Select Band stop filter by clicking on the band pass radio button. This will block rather than pass the fundamental 5Khz signal Step 4: Click on OK to accept parameters
Results: Run the Simulator Again
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Square Wave with Fundamental Blocked
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Rectified Version
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Input Square Wave 5Khz
Exercise: Build a filter with AnadigmFilter Open AnadigmDesigner with a blank workspace and select Anadigm filter icon Next…
Step 1: Design Filter Properties in AnadigmFilter
Step 2: New filter appears in design work space And here it is: AnadigmFilter built a 5 pole Butterworth high pass filter.
Start working with Anadigm Programmable Analog
Purchase Servenger Programmable Analog Module from www.servenger.com
Read the Quick Start Guide:
Go to www.anadigm.com to download and install the latest version of AnadigmDesigner2
Do the simple exercise included to create first Anadigm design – a 440Hz tone generator.
Available is the newly published Prentice-Hall text book which includes the Programmable Analog Module:
Electronic Devices
Eighth Edition
by Thomas Floyd Text is for freshman to junior level programs. The goal is to rapidly teach electronic concepts in a curriculum using computer based design tools including National Instruments Multisim and the Anadigm based Programmable Analog Module.
Order from Pearson / Prentice-Hall www.prenhall.com or your usual book distributor.
ISBN: 0-13242973-X
The accompanying Student Lab Manual is
Laboratory Exercises for Electronic Devices
by David M. Buchla Steven Wetterling The Student Lab Manual develops the concepts and knowledge presented in the Electronic Devices text book using the Anadigm based Programmable Analog Manual.
Order from Pearson / Prentice-Hall www.prenhall.com or your usual book distributor.
ISBN: 0-13-242971-3
Servenger
Electronic Design & Product Development
Steve Wetterling President www.servenger.com Mobile: 503-860-5594 Office: 503-627-9930 Fax: 503-214-8279 [email protected] 515 NW Saltzman Rd #904 Portland, Oregon 97229
www.servenger.com
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