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US 10,896,876 B2Granted
Semiconductor device
AssigneeRenesas Electronics Corporation
InventorsTomoyuki Tanaka, Takahiro Nakamura
Life of this patent
Estimating the term…
Abstract
In a semiconductor device having a variable gain amplifier, a setting error of a gain associated with a crosstalk noise is reduced. A switch block included in the variable gain amplifier includes a plurality of switch transistors Mp1, Mp2, MN1, and Mn2, and can variably set the parallel number of the switches used for coupling by selecting a forward coupling state for coupling the common wirings CSP, CSN to output wirings OUTP, OUTN, respectively, or a cross coupling state for coupling to OUTN, OUTP, respectively. Output wirings OUTN, OUTP form an output wiring pair by extending in a X direction while crossing each other through an underlying wiring layer ML[x-1]. At least one of the common wirings CSP, CSN is located next to the output wiring pair in a Y direction.
Claims20
A semiconductor device comprising:
- a semiconductor substrate having a main surface;
- a plurality of wiring layers formed on the main surface;
- a first common wiring and a second common wiring arranged side by side in a first direction in a plan view in the plurality of wiring layers and extended in a second direction crossing the first direction in the plan view;
- a first differential input wiring and a second differential input wiring arranged side by side in the first direction in the plan view in the plurality of wiring layers, extended in the second direction in the plan view, and transmitting differential input signals;
- a first differential transistor formed on the main surface such that a drain of which is coupled to the first common wiring and a gate of which is coupled to the first differential input wiring;
- a second differential transistor formed on the main surface such that a drain of which is coupled to the second common wiring and a gate of which is coupled to the second differential input wiring;
- an output wiring pair transmitting differential output signals and comprised of a first output wiring and a second output wiring arranged in the plurality of wiring layers;
- and
- a switch block variably set a parallel number of the switch transistors used for coupling, and including a first switch unit and a second switch unit arranged next to each other in the second direction in the plan view, each including a plurality of switch transistors for selecting a forward coupling state in which the first output wiring and the second output wiring are coupled to the first output wiring and the second output wiring, respectively, or a cross coupling state in which the first common wiring and the second common wiring are coupled to the second output wiring and the first output wiring, respectively,
- wherein the first output wiring and the second output wiring cross each other in a first crossing part between the first switch unit and the second switch unit in the second direction in the plan view.
7 more elements
A semiconductor device comprising:
- a semiconductor substrate having a main surface;
- a plurality of wiring layers formed on the main surface;
- a common wiring pair comprised of a first common wiring and a second common wiring arranged in the plurality of wiring layers, extended in a second direction crossing the first direction in the plan view;
- a first differential input wiring and a second differential input wiring arranged side by side in the plurality of wiring layers and extended in the second direction crossing the first direction in the plan view, and transmitting differential input signals;
- a first differential transistor formed on the main surface and having a drain coupled to the first common wiring and a gate coupled to the first differential input wiring;
- a second differential transistor formed on the main surface and having a drain coupled to the second common wiring and having a gate coupled to the second differential input wiring;
- a first output wiring and a second output wiring which are arranged in the plurality of wiring layers and transmitting differential output signals;
- and
- a switch block variably set a parallel number of the switch transistors used for coupling, and including a first switch unit and a second switch unit arranged next to each other in the second direction in the plan view, each including a plurality of switch transistors for selecting a forward coupling state in which the first output wiring and the second output wiring are coupled to the first output wiring and the second output wiring respectively, or a cross coupling state in which the first common wiring and the second common wiring are coupled to the second output wiring and the first output wiring respectively,
- wherein the first output wiring and the second output wiring cross each other in a first crossing part between the first switch unit and the second switch unit in the second direction in the plan view.
7 more elements
A semiconductor device comprising:
- a semiconductor substrate having a main surface;
- a plurality of wiring layers formed on the main surface;
- a first common wiring and a second common wiring arranged side by side in the first direction in the plan view in the plurality of wiring layers and extended in a second direction crossing the first direction in the plan view;
- a first differential input wiring and a second differential input wiring arranged in the plurality of wiring layers and transmitting differential input signals;
- a first differential transistor formed on the main surface such that a drain of which is coupled to the first common wiring and a gate of which is coupled to the first differential input wiring;
- a second differential transistor formed on the main surface such that a drain of which is coupled to the second common wiring and a gate of which is coupled to the second differential input wiring;
- an output wiring pair transmitting differential output signals and comprised of a first output wiring and a second output wiring arranged side by side in the first direction in the plan view in the plurality of wiring layers and extended in the second direction in the plan view;
- and
- a switch block that can variably set a parallel number of the switch transistors used for coupling, and including a first switch unit and a second switch unit arranged next to each other in the second direction in the plan view, each including a plurality of switch transistors for selecting a forward coupling state in which the first output wiring and the second output wiring are coupled to the first output wiring and the second output wiring respectively or a cross coupling state in which the first common wiring and the second common wiring are coupled to the second output wiring and the first output wiring, respectively,
- wherein at least one of the first output wiring and the second output wiring has a first section arranged adjacent to the first common wiring at a first interval in the first direction and is not arranged adjacent to the second common wiring and a second section arranged adjacent to the second common wiring at the first interval in the first direction and is not arranged next to the first common line.
7 more elements
Dependencies are inferred from the claim text.