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Death of Zen (Doz) a New Classpower Amp: (circuit / schematic added 6/03) |
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Digital Nulling of Precision Op Amps: AB-3 Analog Devices Application Notes (app note added 2/06) |
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Digital Volume Control: This circuit could be used for replacing your manual volume control in a stereo
amplifier. In this circuit, push-to-on switch S1 controls the forward (volume increase) operation of both channels while a similar switch S2 controls reverse (volume decrease) operation of
both channels. A readily available IC from Dallas semiconductor, DS1669 is used here.…. (added 10/05) |
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Digital Volume Control: Very simple digital volume, contrast, brightness, or dimmer control (circuit added
8/06) |
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DN0001 - MP7720 - Using Split Supplies: Monolithic Power Systems, Inc Design Note (added 3/06) |
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Dual JT-MB C Microphone Combining Circuit: connect two microphones to1-microph1-input (added 4/02) |
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Dual Microphones Separate Voice from Noise: 06/23/94 EDN-Design Ideas / (added 4/02) The circuit in Fig 1 uses
a pair of microphones to extract a voice from a noisy background. You must mount electret microphones X1 and X2 on the left and right sides of the user's chest. Sound sources not equidistant
from the microphones experience a phase shift. Because sound travels at 1120 ft/sec, the maximum phase shift for this design's mounting scheme is about 0.5 msec. This phase shift corresponds
to a 90 degrees phase shift at about 1000 Hz. Thus, all sounds in the vocal frequency range, except the user's voice, tend to cancel....
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Dynamic Microphone Amplifier: (circuit / schematic added 6/03) |
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Dynamic Microphone to Electret Microphone Input: (electronic schematic added 8/02) |
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ECM MIC PreAmplifier: (schematic added 9/02) |
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El Cheapo a Really Simple Power Amplifier: (circuit / schematic added 6/03) |
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Electret Microphone Connection: how to connect electret microphone (added 4/02) |
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Electret Microphone Powering: (electronic schematic added 8/02) |
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ESP SIM Sound Impairment Monitor): a method of determining just how much your amplifier modifies the original
signal (added 4/02) |
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Grounding for Low-and-High-Frequency Circuits: AN-345 Analog Devices Application Notes (app note added
2/06) Know Your Ground and Signal Paths for Effective Designs. Current Flow Seeks Path of Least Impedance-Not Just Resistance.... |
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Guitar Amplifier 10 Watt: Old-Style ultra-compact Combo2-inputs-Overdrive-Treble-enhancement (added 9/04) |
