US 11,483,022 B2 · Wideband tunable frequency single-sideband converter with PVT tracking

Abstract

A wideband tunable frequency single-subband converter is proposed. The wideband frequency tunable converter operates within a wideband and tunable frequency range, and has process, voltage, and temperature (PVT) tracking capability. In one embodiment, the wideband converter comprises a frequency tunable polyphase filter having a plurality of switchable polyphase resistors. The polyphase resistors are controlled by a frequency tuning control signal to achieve wideband frequency tunability. In a preferred embodiment, a triode mode transistor is used as a polyphase resistor, and a different resistance value of the polyphase filter is realized by turning on one or multiple of the different transistors in triode mode. In addition, a constant Gm(R) bias generator is used to provide the gate biases to the triode mode transistors to maintain a constant and stable resistance value across PVT and other variation.

Claims20

Dependent claims

A wideband frequency tunable converter, comprising:

a wideband frequency tunable polyphase filter that receives an input signal (IF) having a frequency of fIF, wherein the polyphase filter converts the IF signal to IFI and IFQ;
a pair of wideband frequency tunable amplifiers that receive IFI and IFQ and generates amplified input signals with or without a polarity inversion of IFI and IFQ;
a pair of double sideband mixers that multiply the amplified input signals with local oscillator (LO) signals having a frequency of fLO;
and
an output summer that are coupled to the mixers and outputs an output signal (RF), wherein the RF signal has an image frequency of either (fIF+fLO) or (fIF−fLO) under up conversion, selectable by the polarity inversion, wherein the converter operates under a tunable frequency and with process, voltage, and temperature (PVT) tracking and compensation.

2 more elements

Dependencies are inferred from the claim text.

Wideband tunable frequency single-sideband converter with PVT tracking

Life of this patent

Wideband tunable frequency single-sideband converter with PVT tracking

Life of this patent

Abstract

Claims20