Swiss Basel Precision Instruments Converter

SwitzerlandBasel Precision Instruments Converter

Brand Introduction:

Basel Precision Instruments develops ultra-low noise precision laboratories and scientific electronic products for applications that require ultra-high sensitivity, such as low-temperature physics and quantum technology. Our vision is to provide key instruments for the quantum revolution. The company has an experienced technical team that continuously researches and innovates to improve product performance, providing customers with high-quality products and services to meet their needs.

Product range:

SwitzerlandBasel Precision Instruments converters and differential amplifiers.

Related product introduction:

converter

This type of low noise/The highly stable I to V converter (LNHS I/V converter) combines very low input voltage noise, high stability, and low drift input voltage. The use of separate dual J-FET input stages can achieve low input voltage noise. By using a high stability input offset correction circuit, the offset voltage drift of the dual J-FET input stage can be reduced. The block diagram of the LNHS I/V converter is shown below: The LNHS I/V converter is lightweight and has a small casing, allowing the device to be directly installed on the junction box of the low-temperature thermostat or very close to it. This can avoid the cumbersome and sensitive cables (noise pickup, microphone) between the low-temperature thermostat and the preamplifier. Due to the remote control of gain and low-pass cutoff frequency (such as through a computer), LNHS I/V converters can be installed in locations that are not easily accessible. The remote control signal is electrically isolated by an optocoupler, so it will not interfere with sensitive input signals and therefore will not form a grounding circuit.

Feature:

Low input voltage noise

Typical input reference voltage noise: 2 nV/square (Hz) @ 10 Hz

1.2 nV/sqrt (Hz) at 1 kHz

Stable and low drift input voltage

Typical input voltage drift at 25 ° C:=± 0.15 µ V/K

Typical input current noise level: 6 fA/sqrt (Hz) @ 10 Hz, 109 V/A

Fifty years of harvest: 105... 109 V/A

Integrated low-pass filter: 30 Hz... 100 kHz

• Remote controllable gain and LP cutoff

The input voltage can be shifted to ± 100 mV by an external offset voltage

Internal subtraction of input offset voltage (a new feature in SP 983c version)

Green LED indicates when to compensate for input offset voltage and stabilize it

Red LED indicates overload status

SMA input and output connectors/BNC adapters

Overload protection current input

• Small size and light weight

Differential voltage amplifier

A 1 MHz differential voltage amplifier has the characteristics of low input voltage noise and low offset voltage drift. This combination is crucial for long-term measurement of samples at low temperatures. Other commercially available amplifiers suffer from higher voltage noise or lower offset voltage stability within temperature and time ranges.

By using separate dual inputs in the input stageJ-FET（IF 3602）， Can achieve low input voltage noise. The offset voltage drift of this low-noise J-FET input stage is reduced through a precise servo control loop. The voltage gain can be switched between x100, x1 000, and x10 000, and a variable LP filter (100 Hz... 1 MHz) is also integrated. When the gain is x100, it can linearly amplify the input differential voltage up to ± 100 mV. The amplifier can be AC or DC coupled, the input resistance can switch between 10 MOhm, 1 GOhm, and infinity (DC only), and the common mode voltage can be as high as ± 1V. All of these characteristics make it a low-noise/low drift differential amplifier, a multifunctional laboratory preamplifier.