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Low Noise Op Amps (≤ 10nV/√Hz) | Analog Devices
https://www.analog.com/en/products/amplifiers/operational-amplifiers/low-noise-op-amps-lessthanequalto-10nv.html
These high speed, low distortion (1 nV or less) op amps enable better signal fidelity in the most demanding conditions, allowing system designers to achieve the lowest total system noise performance in applications with high source impedances. We feature a considerable variety of these amps with wide supply ranges and low power.
MC33079 - Low-noise op-amps - STMicroelectronics
https://www.st.com/en/amplifiers-and-comparators/mc33079.html
Description The MC33079 device is a monolithic quad operational amplifier particularly well suited for audio applications. It offers low voltage noise (4.5 nV/√ Hz) and high frequency performance (15 MHz gain bandwidth product, 7 V/μs slew rate). In addition the MC33079 device has a very low distortion (0.002%) and excellent phase/gain margins.
LM833: Operational Amplifier, Low Noise, Audio, Dual
https://www.onsemi.com/products/signal-conditioning-control/amplifiers-comparators/operational-amplifiers-op-amps/lm833
The LM833 is a standard low-cost monolithic dual general-purpose op-amp employing bipolar technology with innovative high-performance concepts for audio systems applications.
OPA1692: The perfect Op Amp for low power audio? – Cycfi ...
https://www.cycfi.com/2017/08/opa1692-the-perfect-opamp-for-low-power-audio/
The OPA169x operational amplifiers achieve a new level of performance for low-power amplifiers with a low 4.2-nV/√Hz noise density and distortion of 0.000045% at 1 kHz. These op amps offer rail-to-rail output swing to within 150 mV of the power supplies with a 2-kΩ load, which increases headroom and maximizes dynamic range.
60 dB Low Noise Audio Amplifier - jensign.com
https://www.jensign.com/60dBLowNoiseAudioAmplifier/index.html
60 dB Low Noise Audio Amplifier Nov 05, 2020 The circuit below is a low noise low distortion 60 dB (Av=1000) gain block that can be used as an audio preamplifier for very low signal or noise measurements. A high performance LM4562NA dual op-amp is used. Each half of the op-amp uses a different circuit to demonstrate different usage.
LT1115 Datasheet and Product Info - Analog Devices
https://www.analog.com/en/products/lt1115.html
The LT1115 is the lowest noise audio operational amplifier available. This ultralow noise performance (0.9nV/√Hz at 1kHz) is combined with high slew rates (>15V/µs) and very low distortion specifications.The RIAA circuit shown below using the LT1115 has very low distortion and little deviation from ideal RIAA response (see graph).Applications Hi
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