Active Vector Package
Vector probe with integrated active headstage electronics that digitize signals at the probe tip for low-noise chronic recording.
Overview
The Active Vector Package (pkg_avx) combines a NeuroNexus Vector-Series silicon probe with an onboard preamplifier ASIC (application-specific integrated circuit). Unlike passive packages, the headstage electronics are bonded directly to the probe body, digitizing neural signals at the source before transmitting over a thin digital cable.
How It Works
Digitizing at the probe tip eliminates the main source of noise in neural recording systems: the analog cable between probe and amplifier. In conventional passive setups, the cable acts as an antenna and picks up electromagnetic interference from motors, lights, and equipment. Active packages output a digital bitstream that is immune to cable noise.
Specifications
- Channel Counts: 16, 32, 64, 128, 256 channels (model dependent)
- ADC Resolution: 16-bit
- Sampling Rate: Up to 30 kHz per channel
- Cable: Thin digital cable (2–4mm diameter), up to 2m length
- Power: Low-voltage supply through the digital cable
- Connector: Intan-compatible digital interface
Benefits
- Noise Reduction: Eliminates cable-capacitance noise and EM interference
- Cable Freedom: Animals can move freely without signal degradation
- Chronic Stability: Compact headstage mass reduces brain micro-motion
- Long Cable Runs: Digital signals maintain integrity over 1–2m cables
Compatibility
Requires a DAQ system supporting the Active Vector digital interface, such as NeuroNexus Allego or compatible Intan-based systems. Not directly compatible with passive analog amplifier inputs.
Related
See also: Vector Series, Matrix/AV Package