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Test Integer Programmable Signal Chain

Designer

Description

This "Live" example shows how programmable analog and mixed-signal devices can be modeled at an appropriate level of abstraction, to provide a part-usage learning platform for analog circuit designers. In this design, the details of the digital programming interface are abstracted to a simple set of integer values. These are set by the user via parameters of a GUI model. At the beginning of the simulation run they are passed into the programmable signal chain model, to control the key performance characteristics of that device. Since this is a "Live" design, user can change these programmable settings, as well as the noisy analog input pulse characteristics, then run a new simulation to see the signal chain performance under those conditions.

The signal chain includes a sampled-data low-pass filter with programmable pole frequency, an A2D converter with programmable sample rate, an analog amplifier with programmable gain and offset voltage, and finally an analog input anti-alias low-pass RC filter with programmable R value used to program its pole frequency.

For better understand of the signal chain elements, a schematic version of this device model can be found here:

https://www.systemvision.com/design/test-schematic-model-integer-programmable-signal-chain

Note that in that schematic version of the design, an "injector" element is used to support the concept of dynamic changes to the programmable settings (i.e. settings can be changed during the simulation run).

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Copy of Test Integer Programmable Signal Chain - on Thu, 03/20/2025 - 12:14

Designer

Description

This "Live" example shows how programmable analog and mixed-signal devices can be modeled at an appropriate level of abstraction, to provide a part-usage learning platform for analog circuit designers. In this design, the details of the digital programming interface are abstracted to a simple set of integer values. These are set by the user via parameters of a GUI model. At the beginning of the simulation run they are passed into the programmable signal chain model, to control the key performance characteristics of that device. Since this is a "Live" design, user can change these programmable settings, as well as the noisy analog input pulse characteristics, then run a new simulation to see the signal chain performance under those conditions.

The signal chain includes a sampled-data low-pass filter with programmable pole frequency, an A2D converter with programmable sample rate, an analog amplifier with programmable gain and offset voltage, and finally an analog input anti-alias low-pass RC filter with programmable R value used to program its pole frequency.

For better understand of the signal chain elements, a schematic version of this device model can be found here:

https://www.systemvision.com/design/test-schematic-model-integer-programmable-signal-chain

Note that in that schematic version of the design, an "injector" element is used to support the concept of dynamic changes to the programmable settings (i.e. settings can be changed during the simulation run).

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Test Software Configurable Analog Front End

Designer

Description

This "Live" example shows how programmable analog and mixed-signal devices can be modeled at an appropriate level of abstraction, to provide a part-usage learning platform for analog circuit designers. In this design, the details of the digital programming interface are abstracted to a simple set of integer values. These are set by the user via parameters of a GUI model. At the beginning of the simulation run they are passed into the programmable signal chain model, to control the key performance characteristics of that device. Since this is a "Live" design, user can change these programmable settings, as well as the noisy analog input pulse characteristics, then run a new simulation to see the signal chain performance under those conditions.

The signal chain includes a sampled-data low-pass filter with programmable pole frequency, an A2D converter with programmable sample rate, an analog amplifier with programmable gain and offset voltage, and finally an analog input anti-alias low-pass RC filter with programmable R value used to program its pole frequency.

For better understand of the signal chain elements, a schematic version of this device model can be found here:

https://www.systemvision.com/design/test-schematic-model-integer-programmable-signal-chain

Note that in that schematic version of the design, an "injector" element is used to support the concept of dynamic changes to the programmable settings (i.e. settings can be changed during the simulation run).

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Copy of Test Integer Programmable Signal Chain - on Mon, 04/13/2020 - 22:12

Designer

Description

This "Live" example shows how programmable analog and mixed-signal devices can be modeled at an appropriate level of abstraction, to provide a part-usage learning platform for analog circuit designers. In this design, the details of the digital programming interface are abstracted to a simple set of integer values. These are set by the user via parameters of a GUI model. At the beginning of the simulation run they are passed into the programmable signal chain model, to control the key performance characteristics of that device. Since this is a "Live" design, user can change these programmable settings, as well as the noisy analog input pulse characteristics, then run a new simulation to see the signal chain performance under those conditions.

The signal chain includes a sampled-data low-pass filter with programmable pole frequency, an A2D converter with programmable sample rate, an analog amplifier with programmable gain and offset voltage, and finally an analog input anti-alias low-pass RC filter with programmable R value used to program its pole frequency.

For better understand of the signal chain elements, a schematic version of this device model can be found here:

https://www.systemvision.com/design/test-schematic-model-integer-programmable-signal-chain

Note that in that schematic version of the design, an "injector" element is used to support the concept of dynamic changes to the programmable settings (i.e. settings can be changed during the simulation run).

About text formats

Copy of Test Integer Programmable Signal Chain - on Tue, 03/31/2020 - 22:47

Designer

Description

This "Live" example shows how programmable analog and mixed-signal devices can be modeled at an appropriate level of abstraction, to provide a part-usage learning platform for analog circuit designers. In this design, the details of the digital programming interface are abstracted to a simple set of integer values. These are set by the user via parameters of a GUI model. At the beginning of the simulation run they are passed into the programmable signal chain model, to control the key performance characteristics of that device. Since this is a "Live" design, user can change these programmable settings, as well as the noisy analog input pulse characteristics, then run a new simulation to see the signal chain performance under those conditions.

The signal chain includes a sampled-data low-pass filter with programmable pole frequency, an A2D converter with programmable sample rate, an analog amplifier with programmable gain and offset voltage, and finally an analog input anti-alias low-pass RC filter with programmable R value used to program its pole frequency.

For better understand of the signal chain elements, a schematic version of this device model can be found here:

https://www.systemvision.com/design/test-schematic-model-integer-programmable-signal-chain

Note that in that schematic version of the design, an "injector" element is used to support the concept of dynamic changes to the programmable settings (i.e. settings can be changed during the simulation run).

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Test Schematic Model - Integer Programmable Signal Chain

Designer

Description

This design is used to test the "schematic version" of the signal chain model used in this companion "Live" example:

https://www.systemvision.com/design/test-integer-programmable-signal-chain

As seen here (from left to right), the signal chain includes an analog input anti-alias low-pass RC filter with programmable R value (which is used to program its pole frequency), an analog amplifier with programmable gain and offset voltage, an A2D converter with programmable sample rate, and finally a sampled-data low-pass filter with programmable pole frequency,

Note that in this schematic version of the design, an "injector" element is used to support the concept of dynamic changes to the programmable settings (i.e. settings can be changed during the simulation run). In this case, the first element in the integer vector bus is changed from count 2 to count 1 at time 20msec. This effectively changes the sampled-data LPF pole frequency from 1kHz to 500Hz, and the corresponding reduction in the noise level of the integer valued output pulse can be observed between the first and the second pulse (see the red "int_output" waveform on the far right).

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