Table 1.

Summary of the electrical specifications and performance of the programmable sustaining amplifier.

Chip Components	Performance
Low-Noise Amplifier (LNA) (for IB = 2.5 µA)	Gain: 12 dB; Bandwidth: ~1 MHz Thermal Noise PSD: 13 nV/Hz1/2 1/f Corner Frequency: <10 kHz
Band-Pass Filter (BPF)	Center Frequency (f0): 2–90 kHz; Q: 1–8 Dynamic Range (DR): 60.7 dB (24 kHz, Q = 2) Linear Range: 500 mV (THD < 5%, 24 kHz, Q = 2)
All-Pass Filter (APF)	Phase Control: 0–360° Phase Control Sensitivity: ~0.6°/nA
Variable Gain Amplifier (VGA)	Settable Gain: 0–80 dB
Automatic Level Control (ALC)	Amplitude Control Voltage (VED): 0–0.5 V ED Time Constant: 8-Bit control
Background Compensation Path	Gain Control: −20 to 40 dB Phase Control: 0–180°