density modulation

density modulation

[′den·səd·ē ‚mäj·ə′lā·shən]
(electronics)
Modulation of an electron beam by making the density of the electrons in the beam vary with time.
References in periodicals archive ?
today announced it has enhanced its DesignWare ARC Data Fusion IP Subsystem with a new suite of tightly coupled interface peripherals including pulse density modulation (PDM), I2S and I3C, as well as an audio processing software library to speed application software development.
The AD242x devices include an improved pulse density modulation block that is critical for next-generation microphone connectivity applications.
Other modem functions implemented as Virtual Peripheral software modules include D/A conversion using Pulse Density Modulation, low-pass and high-pass digital filtering, DTMF generation and detection, Caller-ID and Call-Progress.
These devices integrate a pre-amplifier, Low Drop-Out Regulator (LDO) and Analog-to-Digital Converter (ADC) that converts Electret Condenser Microphone (ECM) outputs to digital pulse density modulation (PDM) data streams.
The 'Digital' is a single bit, Pulse Density Modulation (PDM) device, has an integrated sleep mode, and is compatible with stereo input applications.
While most Class-D amplifiers use some variation of pulse-width modulation (PWM), ADI's Class-D amplifiers use a sigma-delta pulse density modulation (PDM) to reduce the amplitude of spectral components at high-frequencies, thus significantly minimizing EMI emissions.
SACD playback is optimized in the DVP-S9000ES with a number of proprietary technologies that minimize distortion, including an advanced DSD decoder LSI and an Accurate Complement Pulse Density Modulation System.
To do so we will use a high-resolution in-trap imaging of quasi-two- dimensional atomic clouds, with which we can image density modulations of the ground state revealing the first signs of long-range order.