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.
11n protocol with wider instantaneous bandwidth up to 160MHz, more MIMO channels, and higher density modulation
up to 256QAM.
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.
The density modulation
technology for low-k films enables control of dielectric constants and mechanical strength of low-k films by changing the mixing ratio of two types of precursors using plasma co- polymerization technology.
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
Altium uses the highest density modulation
for a broadband wireless access product (128 QAM) to deliver 155-Mbps wireless fiber-like capacity in only 28 MHz of radio frequency bandwidth, half that of similar wireless products.
Altium uses the industry's highest density modulation
for a broadband wireless access product (128 QAM) to deliver 155-Mbps wireless fiber-like capacity in only 28 MHz of radio frequency bandwidth, half that of other wireless products.
These higher density modulation
formats allow symbol rates from 2.
An Accurate Complement Pulse Density Modulation
(ACP) system also helps maintain the DSD pulse values at a consistent level, by eliminating switching distortion associated with typical high-speed devices.