Application notes

Optimizing a phase-locked loop via open-loop transfer function analysis

In this application note, a voltage-controlled oscillator (VCO) is stabilized using the Moku:Pro in Multi-Instrument Mode, integrating a Lock-in Amplifier for error detection and feedback control with a Frequency Response Analyzer for measuring the transfer function. The system’s open loop transfer function (OLTF) is modeled, simulated, and validated against experimental measurements.

Featuring: Moku:Pro, Frequency Response Analyzer, Lock-in Amplifier

Phase measurement of microvolt signals by limiting signal bandwidth

In this application note, we demonstrate how to phase-modulate and externally attenuate a high-frequency tone to achieve peak-to-peak signal amplitudes in the microvolt and sub-microvolt range.

Featuring: Moku:Pro, Lock-in Amplifier

Figure 3: Frequency Response Analyzer interface and settings for PSRR
Power Supply Rejection Ratio Measurements with the Moku:Pro Frequency Response Analyzer

In this application note, the Frequency Response Analyzer is used to inject a perturbation signal onto the DC input of a voltage regulator, and to measure the transfer function of the input ripple to the output ripple of the regulator.

Featuring: Moku:Pro, Frequency Response Analyzer

Results of the FRA show that the real resonant peak is about 4.0956 MHz.
Dual Frequency Resonance Tracking: Part 2

Learn how the DFRT method works when tracking the resonant peak of a crystal to test the real-world capability.

Featuring: Moku:Pro, Frequency Response Analyzer, Multi-Instrument Mode, Waveform Generator, Phasemeter, Lock-in Amplifier

Building dual boxcar averagers

Explore the configuration and operational principles of dual boxcar averagers, using Moku Cloud Compile on Moku:Pro — and find out how to download the bitstreams

Featuring: Moku:Pro, Moku Cloud Compile

Moku Cloud Compile: A getting started guide

Get step-by-step instructions on how to compile and deploy custom FPGA code to your Moku device

Featuring: Moku:Pro, MATLAB, Moku Cloud Compile

Figure 1: Recommended workflow for Moku Cloud Compile + HDL Coder DSP Design.
Moku Cloud Compile with MathWorks HDL Coder – Part 2: Simulink

Generate deployable VHDL code on Moku:Pro – Part 2: Simulink

Featuring: Moku:Pro, MATLAB, Moku Cloud Compile

Figure 1: Recommended workflow for Cloud Compile + HDL Coder DSP Design.
Moku Cloud Compile with MathWorks HDL Coder – Part 1: MATLAB

Generate deployable VHDL code on Moku:Pro – Part 1: MATLAB

Featuring: Moku:Pro, MATLAB

Resonance Magnitude Response
Dual-frequency resonance tracking (DFRT)

Learn how to implement Dual Frequency Resonance Tracking on Moku:Pro

Featuring: PID Controller, Lock-in Amplifier, Waveform Generator

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