A headstage for a Neural Data Acquisition System is shown and described. In one embodiment, the headstage includes at least one Input Pre-amplifier, and a multiplexer (MUX) for multiplexing at least one channel. In one embodiment, the input filter of the Input Pre-amplifier is tuned by adjusting the gate voltage of a transistor operating in sub-threshold mode.
1. A headstage for a neural data acquisition system, the headstage comprising:
an Input Pre-amplifier;
a multiplexer (MUX) for multiplexing at least one channel; and
an RF Modulator comprising a voltage control oscillator (VCO),
wherein an input filter of the Input Pre-amplifier is tuned by adjusting the gate voltage of a transistor operating in sub-threshold mode, and
wherein input impedance of the RF Modulator is configured to allow the MUX to drive the RF stare directly.
2. The headstage of claim 1 , wherein the at least one transistor is an on-chip resistor.
3. The headstage of claim 1 , wherein the at least one on-chip transistor includes at least two dual stacked transistors.
4. The headstage of claim 1 , wherein the at least one transistor includes at least one metal-oxide-semiconductor field-effect transistor (MOSFET).
5. The headstage of claim 1 , wherein the Input Pre-amplifier is a capacitor coupled high pass filter.
6. The headstage of claim 1 , wherein the at least one transistor includes dual stacked on-chip sub-threshold transistors, and wherein the input bias voltage of the Pre-amplifier is tuned by the gate voltage of the dual stacked on-chip sub-threshold transistors for the at least one channel with at least one off-chip resistor.
7. The headstage of claim 1 , wherein the input filter is configured to filter at a bandwidth of 0.1-10 kHz bandwidth.
8. The headstage of claim 1 , wherein the Pre-amplifier has user-selectable gain for all channels and for each channel individually.
9. The headstage of claim 1 , further including a transmitting antenna configured to transmit at a range of about less than 10 meters, thereby permitting denser use.
10. The headstage of claim 1 , further including a power supply.
11. The headstage of claim 1 , further including a clock.
12. A headstage for a neural data acquisition system, the headstage comprising:
an Input Pre-amplifier;
a multiplexer (MUX) for multiplexing at least one channel, wherein an input filter of the Input Pre-amplifier is tuned by at least one resistor; and
an RF Modulator comprising a voltage control oscillator (VCO), wherein input impedance of the RE Modulator is configured to allow the MUX to drive the RF stage directly.
13. The headstage of claim 12 , wherein the at least one resistor is a transistor configured to operate as a resistor.
14. The headstage of claim 12 , wherein the at least one resistor is an on-chip resistor.
15. The headstage of claim 14 , wherein the at least one on-chip resistor includes at least two dual stacked resistors.
16. The headstage of claim 12 , wherein the at least one resistor includes a transistor operating in sub-threshold mode.
17. The headstage of claim 12 , wherein the Input Pre-amplifier is a capacitor coupled high pass filter.
18. The headstage of claim 12 , wherein the input filter is configured to filter at a bandwidth of 0.1-10 kHz bandwidth.
19. The headstage of claim 12 , wherein the Pre-amplifier has user-selectable gain for all channels and for each channel individually.
20. The headstage of claim 12 , wherein the MUX is configured to sample at greater than 50 kHz per channel and is configured to multiplex from a number of channels selected from at least 16 channels, at least 32 channels, at least 100 channels, and at least 250 channels.
21. The headstage of claim 12 , further including a transmitting antenna configured to transmit at a range of about less than 10 meters, thereby permitting denser use.
22. The headstage of claim 12 , further including a power supply and a clock.
23. A method of neural data monitoring, comprising the steps of:
implanting electrodes into the brain of a specimen;
connecting the electrode connector of a headstage to the implanted electrodes, wherein the headstage includes an Input Pre-amplifier, a multiplexer (MUX) for multiplexing at least one channel,
wherein an input filter of the Input Pre-amplifier is tuned by adjusting the gate voltage of a transistor operating in sub-threshold mode,
wherein the at least one transistor includes dual stacked on-chip sub-threshold transistors, and wherein the input bias voltage of the Pre-amplifier is tuned by the gate voltage of the dual stacked on-chip sub-threshold transistors for the at least one channel with at least one off-chip resistor; and
transmitting neural data via a transmitting antenna.
24. A headstage for a neural data acquisition system, the headstage comprising:
an Input Pre-amplifier; and
a multiplexer (MUX) for multiplexing at least one channel,
wherein an input filter of the Input Pre-amplifier is tuned by adjusting the gate voltage of at least one transistor operating in sub-threshold mode,
wherein the at least one transistor includes dual stacked on-chip sub-threshold transistors, and
wherein the input bias voltage of the Pre-amplifier is tuned by the gate voltage of the dual stacked on-chip sub-threshold transistors for the at least one channel with at least one off-chip resistor.
25. The headstage of claim 24 , wherein the Input Pre-amplifier is a capacitor coupled high pass filter.
26. The headstage of claim 24 , wherein the input filter is configured to filter at a bandwidth of 0.1-10 kHz bandwidth.
27. The headstage of claim 24 , wherein the Pre-amplifier has user-selectable gain for all channels and for each channel individually.