PWM amplifiers and Switch-Mode Power Supplies are based on many years experience with audio design and power conversion design.
Recently we have developed a new series of pwm amplifiers called the
Delta-series taking class-d amplifiers a step forward in audio quality ,
also compared with good linear amplifiers.
It is sort of hybrid between analog and switching amplifiers, input stage
is discrete class-d, modulator is discrete delta/sigma modulation, drivers
are high voltage and high current drivers, output is after the filter and
is again very analog in nature.
Frequency response is linear from 10Hz to 30 kHz and is widely independant
of load impedance, noise and THD is very good , EMI is very good, square
wave response is very good, like a good analog amplifier.
For multi-channel applications we think it is the best configuration too.
Lately more integrated designs have matured, we have made designs with
and we focus on these for low and medium power designs to keep the cost
EMC and noise issues are dealt with from the design phase and we use
multi-layer pcbs with ground planes and decoupling combined with EMC filters at
the output and power inputs.
Our switch-mode power supplies (SMPS) are designed to power audio
amplifiers with the very fluctuating load this presents to the supply and
are again unconditionally stable and works very well into no load or full
Power factor corrention (PFC) becomes very attractive or mandatory at high
power levels, the PFC circuit ensures a load from the AC line very much
true resistive load and unlike the very high peak currents associated with
power supplies (SMPS or linear).
Typical applications for our amplifers (and power supplies) are;
*Home Cinema Amplifiers
*Musical Instrument Amplifiers
*CAR audio amplifiers
1 kHz square wave
10 kHz square wave
THD+N - 1W & 400W