Qorvo Us, Inc.

Stichting Imec Nederland

Gaurav Singh

Johan Van Den Heuvel

Erwin Allebes

A polar transmitter is provided. The polar transmitter includes a baseband generation unit configured to generate phase data bits and amplitude data bits of an output pulse. The polar transmitter further includes a bandwidth control unit downstream to the baseband generation unit configured to regulate the width of the output pulse. Moreover, the polar transmitter includes a pulse shaping unit downstream to the bandwidth control unit configured to generate a predefined amplitude envelope of the output pulse. In this context, the pulse shaping unit includes a delay-line with a plurality of taps, where each tap output is configured to be amplitude weighted in order to generate the amplitude envelope of the output pulse.

Asynchronous polar transmitter and operation method thereof

Voltage regulators with fast transient response are provided herein. According to one aspect, a voltage regulator for accepting an input voltage (V) and producing an output voltage (V) includes an operational amplifier having as a first input (V) and having as a second input a feedback voltage (V); an output amplifier having an input coupled to the output of the operational amplifier and an output that produces V, the output being coupled to a feedback path that produces V; a compensation capacitor (Cc) connected between the output of the output amplifier and an input to a buffer amplifier that supplies a voltage to the input of the output amplifier. The buffer amplifier has a transconductance (gm) that is controlled to be proportional to a load current (I), thereby causing the left hand plane zero of the buffer amplifier to cancel the pole created by the output amplifier.

Voltage regulator with fast transient response

Voltage regulators with fast transient response are provided herein. According to one aspect, a voltage regulator for accepting an input voltage (V) and producing an output voltage (V) includes an operational amplifier having as a first input (V) and having as a second input a feedback voltage (VF); an output amplifier having an input coupled to the output of the operational amplifier and an output that produces V, the output being coupled to a feedback path that produces VF; a compensation capacitor (Cc) connected between the output of the output amplifier and an input to a buffer amplifier that supplies a voltage to the input of the output amplifier. The buffer amplifier has a transconductance (gm) that is controlled to be proportional to a load current (I), thereby causing the left hand plane zero of the buffer amplifier to cancel the pole created by the output amplifier.

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Eindhoven, Netherlands

Gaurav Singh