Existing designs

List here existing designs and products that have 2Q functionality that could be used, e.g. for comparison or to create a specification, and in the case of open source could also be used as a starting point for our design.

LTC/Analog

• LT1970 (see its DS, internal circuits described on pg.10)
  See also article: Power Op Amp Protects Load Circuitry with Precise Current Limiting in Linear technology VOLUME XII NUMBER 3

TI

• LM3886, See discussion on yu3ma forum: Prepravka BatoMM u LAB PS

R&S (Germany)

• NGL200 Power supply series
  Max. output power: 120 W
  Voltage per channel: 0 V to 20 V
  Max. current per channel: 6 A
  Load recovery time: < 30 µs
  Ripple and noise: < 500 µVRMS / < 1 mARMS
• NGM200 Power supply series
  Max. output power: 120 W
  Voltage per channel: 0 V to 20 V
  Max. current per channel: 6 A
  Resolutions down to 1 µV/10 nA
  500 ksample/s high-speed data logging

Tek/Keithley (US/UK)

• 2281S-20-6 Dynamic Model Battery Simulator

Keysight (US)

• B2900A Series Precision Source/Measure Unit (SMU)
  Minimum source resolution: 1 pA /1 μV
  Minimum measurement resolution: 100 fA/100 nV
  Maximum output: 210 V, 3 A DC/10.5 A pulse
  Arbitrary waveform generation and digitizing capabilities from 20 μs interval
• N6700 Modular Power System

Qoitech (Sweden)

• Otii Standard
  Sink current: 2.5 A
  Sink current, resolution: 39 µA
  Sink voltage, external power supply: 0.85 - 5.0 V
  Sample rate in 0 – 5 A range: 1 ksps
  Sample rate in ±19 mA range: 4 ksps Total accuracy: ±(0.1 % + 1.5 mV)