Current generator circuit and method for reduced power consumption and fast response
First Claim
1. A current circuit configured to receive a reference current and having an output at which an output current is provided, the current circuit comprising:
- a first current mirror configured to receive a first portion of the reference current and further configured to mirror the first portion of the reference current to provide a first current; and
a second current mirror configured to receive a second portion of the reference current and coupled to the first current mirror to receive the first current, the second current mirror configured to provide a portion of the first current to the output of the current output current and further configured to receive another portion of the first current and mirror the same as the second portion of the reference current.
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Accused Products
Abstract
Current circuits, circuits configured to provide a bias voltage, and methods for providing a bias voltage are described, including a current circuit configured to receive a reference current and having an output at which an output current is provided. One such current circuit includes a first current mirror configured to receive a first portion of the reference current and further configured to mirror the first portion of the reference current to provide a first current. The current circuit further includes a second current mirror configured to receive a second portion of the reference current and receive the first current. The second current mirror is further configured to provide a portion of the first current to the output of the current circuit as the output current and to receive another portion of the first current and mirror the same as the second portion of the reference current.
15 Citations
24 Claims
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1. A current circuit configured to receive a reference current and having an output at which an output current is provided, the current circuit comprising:
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a first current mirror configured to receive a first portion of the reference current and further configured to mirror the first portion of the reference current to provide a first current; and a second current mirror configured to receive a second portion of the reference current and coupled to the first current mirror to receive the first current, the second current mirror configured to provide a portion of the first current to the output of the current output current and further configured to receive another portion of the first current and mirror the same as the second portion of the reference current. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A circuit configured to provide a bias voltage, the circuit comprising:
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a capacitance having a node at which the bias voltage is provided; a current source configured to provide a reference current; a current subtraction stage coupled to the current source and configured to split the reference current into first and second currents, the first current adjusted responsive to the bias voltage and the second current based at least in part on the first current; a current mirror stage coupled to the current subtraction stage to receive the second current and mirror the second current to provide a mirrored current; a current output stage coupled to the current mirror stage to receive the mirrored current and having an output coupled to the capacitance, the current output stage configured to provide an output current to the capacitance based at least in part on the mirrored current and the bias voltage. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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18. A method for providing a bias voltage, comprising:
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providing an output current having first and second current components, the sum of which equal to the output current, the first current component for charging or discharging a capacitance; and adjusting the output current based at least in part on the second current component of the output current. - View Dependent Claims (19, 20, 21, 22, 23, 24)
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Specification