Replica bias circuit
First Claim
1. A replica bias circuit for applying a reference voltage to gates of target transistors constituting an electronic circuit, the replica bias circuit comprising:
- a sub threshold voltage generator comprising;
a low voltage transistor; and
a sub threshold current forcer allowing smaller current relative to a channel dimension of the low voltage transistor to flow into the low voltage transistor,wherein the sub threshold voltage generator maintains a sub threshold voltage lower than a threshold voltage of the low voltage transistor; and
a replica path including devices designed by referring to dimensions of constituent devices forming a current flow path, the current flow path including the target transistors in the electronic circuit.
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Accused Products
Abstract
Provided is a replica bias circuit which is suitable for multi-layer stacked CMOS current mode logic (CML) and is stably used in application fields using a low power supply voltage. The replica bias circuit applies a reference voltage to gates of target transistors constituting an electronic circuit. The replica bias circuit includes a sub threshold voltage generator for maintaining a voltage difference lower than a threshold voltage of the transistor; and a replica path including devices designed by referring to dimensions of constituent devices forming a current flow path, the current flow path including the target transistors in the electronic circuit. With the replica bias circuit, multi-layer stacked CMOS current mode logic (CML) circuits can stably operate even at a low power supply voltage.
11 Citations
14 Claims
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1. A replica bias circuit for applying a reference voltage to gates of target transistors constituting an electronic circuit, the replica bias circuit comprising:
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a sub threshold voltage generator comprising; a low voltage transistor; and a sub threshold current forcer allowing smaller current relative to a channel dimension of the low voltage transistor to flow into the low voltage transistor, wherein the sub threshold voltage generator maintains a sub threshold voltage lower than a threshold voltage of the low voltage transistor; and a replica path including devices designed by referring to dimensions of constituent devices forming a current flow path, the current flow path including the target transistors in the electronic circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A replica bias circuit for applying a reference voltage to gates of target transistors constituting an electronic circuit, the replica bias circuit comprising:
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a sub threshold voltage generator maintaining a sub threshold voltage lower than a threshold voltage of the low voltage transistor; and a replica path including devices designed by referring to dimensions of constituent devices forming a current flow path, the current flow path including the target transistors in the electronic circuit, wherein the replica path comprises at least one transistor providing a current flow channel, and the sub threshold voltage generator forces at least one of the transistors forming the replica path to operate in a saturation area. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification