Neural recording system
AssigneeThe Regents of the University of California
InventorsYi-Kai Lo, Wentai Liu
Life of this patent
Estimating the term…
Abstract
A neuron recording system was provided. By using the gain-boosted topology, the amplifier input impedance can be increased while simultaneously reducing the noise. The system can be configured to record local field potentials (LFPs) and neuron spikes, respectively, with low-power consumption. With the flexible digital controller module (DCM), any subset of the recording channels can be activated for recording with independent sampling rate at each channel. A wireless interface to transmit recorded neuron data and an on-chip neuron processor to perform real-time signal processing can be incorporated in the system.
Claims5
A fully integrated neural amplifier of neural signals, comprising:
- (a) a working electrode and a counter electrode both connected to a DC block capacitor Cin;
- (b) a capacitive feedback circuit for setting a gain of said neural amplifier as the ratio of said input capacitor (Cin) and a feedback capacitor (Cf);
- and
- (c) a folded-cascode (FC) amplifier with a gain booster;
- (d) wherein said gain booster comprises two common-source (CS) amplifiers;
- (e) wherein said first common-source (CS) amplifier is formed by a differential pair with diode-connected load;
- (f) wherein the differential outputs of said first common-source (CS) amplifier are connected to two gates of current source transistors of said folded-cascode (FC) amplifier, respectively, which are used as the second common-source (CS) amplifier;
- and
- (g) wherein said second common-source (CS) amplifier is embedded into the folded branch of said folded-cascode (FC) amplifier for the purpose of minimizing current consumption.
Dependencies are inferred from the claim text.