Envelope tracking current bias circuit and power amplifying device
AssigneeSamsung Electro-Mechanics Co., Ltd.
InventorsByeong Hak Jo, Jong Ok Ha, Jeong Hoon Kim
Life of this patent
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Abstract
An envelope tracking (ET) current bias circuit includes a rectifying circuit, a phase compensation circuit, and a voltage/current conversion circuit. The rectifying circuit is configured to detect an envelope voltage from a radio frequency (RF) signal. The phase compensation circuit is configured to compensate for a phase of the envelope voltage in which the phase thereof is delayed in the rectifying circuit to output a phase compensated enveloped voltage. The voltage/current conversion circuit is configured to convert the phase compensated envelope voltage into an ET bias current.
Claims14
An envelope tracking (ET) current bias circuit, comprising:
- a rectifying circuit configured to detect an envelope voltage from a radio frequency (RF) signal;
- a phase compensation circuit configured to compensate for a phase of the envelope voltage in which the phase thereof is delayed in the rectifying circuit to output a phase compensated enveloped voltage using a phase compensation value varied responsive to a first control signal;
- and
- a voltage/current conversion circuit configured to convert the phase compensated envelope voltage into an ET bias current.
An envelope tracking (ET) current bias circuit, comprising:
- a rectifying circuit configured to detect an envelope voltage from a radio frequency (RF) signal;
- a phase compensation circuit configured to compensate for a phase of the envelope voltage in which the phase thereof is delayed in the rectifying circuit to output a phase compensated enveloped voltage;
- and
- a voltage/current conversion circuit configured to convert the phase compensated envelope voltage into an ET bias current,
- wherein the phase compensation circuit comprises:
- a phase leading circuit configured to compensate for the phase of the envelope voltage from the rectifying circuit using a phase compensation value varied responsive to a first control signal to output the phase compensated envelope voltage;
- and
- an amplification circuit configured to amplify the phase compensated envelope voltage output from the phase leading circuit to compensate for amplitude of a signal reduced by the phase leading circuit.
A power amplifying device, comprising:
- a power amplifier configured to amplify a radio frequency (RF) signal;
- an envelope tracking (ET) current bias circuit configured to generate an ET bias current to provide the generated ET bias current to the power amplifier, and the ET current bias circuit comprising:
- a rectifying circuit configured to detect an envelope voltage from the RF signal;
- a phase compensation circuit configured to compensate for a phase of the envelope voltage in which the phase is delayed in the rectifying circuit to output a phase compensated enveloped voltage using a phase compensation value varied responsive to a first control signal;
- and
- a voltage/current conversion circuit configured to convert the phase compensated envelope voltage input from the phase compensation circuit into an ET bias current;
- and
- a VCC circuit configured to generate a source voltage to provide the generated source voltage to the power amplifier.
Dependencies are inferred from the claim text.