PWM limiter
AssigneeKoninklijke Philips Electronics N.V.
InventorMarco Berkhout
Life of this patent
Estimating the term…
Abstract
The invention provides an improved push-pull amplifier with a pulse width modulator limiter for limiting the modulation depth. Herewith the disadvantages of the prior art are overcome wherein the high side output switch can be closed for a time period which results in distortions.
Claims4
A push-pull amplifier having an input for receiving an input signal and an output for supplying an output signal whereby the push-pull amplifier comprises a pulse width modulator comprising at least two integrators, a comparator and a feedback element, a switching unit having at least two switches coupled to the output of the pulse width modulator and a demodulator filter coupled to the output of the switching unit characterized in that the pulse width modulator comprises a pulse width modulator limiter for limiting demodulation depth.
Dependencies are inferred from the claim text.