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Conventional capacitively coupled neural recording amplifiers often present a large input load capacitance to the neural signal source and hence take up large circuit area. They suffer due to the unavoidable trade-off between the input capacitance and chip area versus the amplifier gain. In this work, this trade-off is relaxed by replacing the single(More)
In addition to minimizing input-referred noise and lowering power consumption, a good multi-channel neural amplifier system should be able to significantly reject common-mode electrical interference (CMI). The dominant source of CMI comes from capacitive coupling of electrical mains supply line or EMGs onto neural tissues and can be as high as(More)
Neural signal recording is critical in modern day neuroscience research and emerging neural prosthesis programs. Neural recording requires the use of precise, low-noise amplifier systems to acquire and condition the weak neural signals that are transduced through electrode interfaces. Neural amplifiers and amplifier-based systems are available commercially(More)
This paper describes a inductively powered multichannel bionic neural link (BNL) system-on-chip (SOC) for peripheral nerve function restoration. The BNL-SOC consists of 8 neural recording and 4 stimulation channels, and is implemented in a 0.35-μm CMOS technology. Full function of the BNL has been demonstrated with in-vivo animal experiments. The(More)
Neuroprosthetic devices that interface with the nervous system to restore functional motor activity offer a viable alternative to nerve regeneration, especially in proximal nerve injuries like brachial plexus injuries where muscle atrophy may set in before nerve re-innervation occurs. Prior studies have used control signals from muscle or cortical activity.(More)
This paper presents a one-pin crystal oscillator realized in a standard 0.35-mum CMOS technology. Based on a three point oscillator topology, the single one-pin crystal oscillator core circuit is designed to operate over a supply voltage range of 1.62 V to 3.63 V, a temperature range from -10degC to 60degC in both fundamental and overtone modes. It allows a(More)
This paper reports a high-performance low-power and area-efficient single-ended SAR ADC for neural signal acquisition. The proposed 10-bit ADC features a novel symmetrical DAC switching technique that resolves the signal-dependent comparator offset voltage problem in conventional single-ended SAR ADCs, and improves the ADC's ENOB. Combined with an existing(More)
Peripheral nerve injuries with large gaps and long nerve regrowth paths are difficult to repair using existing surgical techniques, due to nerve degeneration and muscle atrophy. This paper proposes a Bionic Neural Link (BNL) as an alternative way for peripheral nerve repair. The concept of the BNL is described, along with the hypothetical benefits. A(More)
Multichannel neural amplifiers are commonly implemented with a shared reference whose input impedance is several times lower than that of the corresponding signal inputs. This huge impedance mismatch significantly degrades the total common mode rejection ratio (TCMRR) regardless of the amplifier's intrinsic CMRR (ICMRR). This study reports a multichannel(More)
Restoration of motor function in cases of peripheral nerve injury is a challenging problem. Although peripheral nerves do regenerate, the time required for peripheral nerves to regenerate often causes atrophy to occur in the muscles before they can be re-innervated. This paper presents a solution through proximal recording of nerve signals and distal muscle(More)