This website uses cookies to implement certain functions. If you use this website you agree to our Privacy Policy.
News and Information about the Test of Electronics in Research & Design, Production, Maintenance, and Installation.  

Newsletter

Register to our newsletter
Every two weeks -
all news at a glance
captcha 

News - General T&M

Lock-in Amplifier with optional Quad-PID Feedback Loop

ZI MF PID24 January 2017 - Zurich Instruments added the MF-PID option with 4 independent PID (proportional - integral - derivative) controllers to their MFLI, a 500 kHz / 5 MHz lock-in amplifier. The MF-PID option builds on class-leading specifications of the MFLI such as low input noise of 2.5nV/√Hz and a high dynamic reserve of 120 dB. Each controller is seamlessly integrated with the lock-in amplifier, using inputs from a multitude of internal measurement data and analog input signals. The maximum control loop bandwidth is 50 kHz.

When setting up a new control loop, the user is well supported by the LabOne PID-Advisor which offers a selection of models that can be picked and adjusted to have a close match with different applications. After defining the target bandwidth, the PID-Advisor suggests a set of parameters and graphically displays the corresponding transfer-function and step-response. Once the feedback loop is running, the auto-tune function optimizes the parameters to minimize the residual PID error. The software toolset included in LabOne also offers a parametric sweeper, oscilloscope and spectrum analyzer. These tools can be used to efficiently analyze the performance of the loop and compare to the selected model. In phase-locked-loop (PLL) mode, phase unwrapping extends the input range to ±1024π, meaning a reliable feedback at start-up and robust operation throughout.

Applications

The MF-PID option can be used in many applications, including frequency combs, frequency-transfer-locks, optical fiber noise-cancellation, atomic force microscopy (AFM), scanning tunneling microscopy (STM), scanning near-field optical microscopy (SNOM), MEMS resonators and gyroscopes.

www.zhinst.com/



Related Articles:

No related articles found


Upcoming Events

Embedded World 2024
Nuremberg (Germany)
09 to 11 April
Control 2024
Stuttgart (Germany)
23 to 26 April
Automotive Testing Expo Europe 2024
Stuttgart (Germany)
04 to 06 June

  More events...
  See our Trade Show Calendar
  Click here