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US 10,763,827 B1Granted
Delay line with controllable phase-shifting cells
AssigneeNXP B.V.
InventorHenry Andre Christange
Life of this patent
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Abstract
A delay line includes one or more phase-shifting cells, where each phase-shifting cell includes a high-pass filter circuit that may be selectively coupled to or decoupled from a transmission line. The filter circuit is couplable in parallel with the transmission line and shifts a signal conveyed through the transmission line by a predetermined phase angle. The high-pass filter circuit includes one or more capacitors and one or more reactance elements (e.g., inductors). The selective coupling may be achieved using multi-gate transistors.
Claims20
A phase-shifting cell, comprising:
- a transmission line conductor having a first end and a second end;
- and
- a high-pass filter circuit configured to be selectively coupled in parallel with the transmission line conductor between the first end and the second end, wherein the transmission line conductor and the high-pass filter circuit are configured to receive respective portions of a divided input signal when the high-pass filter circuit is coupled in parallel to the transmission line conductor and wherein the high-pass filter circuit is configured to shift a phase of the input signal conveyed through the transmission line conductor by a predetermined phase angle when the high-pass filter circuit is coupled to the transmission line conductor.
A delay line comprising:
- a first phase-shifting cell that includes
- a first transmission line conductor having a first end and a second end, and
- a first high-pass filter circuit configured to be selectively coupled in parallel with the first transmission line conductor between the first end and the second end, wherein the first transmission line conductor and the first high-pass filter circuit are configured to receive respective portions of a divided input signal when the first high-pass filter circuit is coupled in parallel to the first transmission line conductor and wherein the first high-pass filter circuit is configured to shift a phase of an input signal conveyed through the delay line by a first predetermined phase angle when the first high-pass filter circuit is coupled to the first transmission line conductor;
- and
- a second phase-shifting cell that includes
- a second transmission line conductor having a third end and a fourth end, wherein the third end of the second transmission line conductor is coupled to the second end of the first transmission line conductor, and
- a second high-pass filter circuit configured to be selectively coupled in parallel with the second transmission line conductor between the third end and the fourth end, wherein the second high-pass filter circuit is configured to shift the phase of the input signal conveyed through the delay line by a second predetermined phase angle when the second high-pass filter circuit is coupled to the second transmission line conductor.
4 more elements
Dependencies are inferred from the claim text.