MEMS driver
First Claim
Patent Images
1. A MEMS driver, comprising:
- a programmable current source, the programmable current source generating an output current for a programmable time; and
an integrator coupled to receive the output current from the programmable current source, the integrator providing a voltage which can be coupled to a drive electrode of a MEMS structure.
0 Assignments
0 Petitions
Accused Products
Abstract
A MEMS driver includes a digital control block receiving an external digital control word and generating digital control signals for use in controlling a reference current source. The reference current source generates a reference current to a high voltage output stage in response to the digital control signals. The high voltage output stage generates an output current to an integrator in response to the reference current. The integrator provides an output voltage to a drive electrode that electrostically controls the position of the MEMS structure.
-
Citations
75 Claims
-
1. A MEMS driver, comprising:
-
a programmable current source, the programmable current source generating an output current for a programmable time; and
an integrator coupled to receive the output current from the programmable current source, the integrator providing a voltage which can be coupled to a drive electrode of a MEMS structure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
-
-
14. A MEMS driver, comprising:
-
a programmable current source, comprising;
a reference current source coupled to receive a digital control word, the reference current source generating a reference current in response to the digital control word; and
an output stage coupled to the reference current source to receive the reference current, the output stage generating an output current proportional to the reference current;
an integrator coupled to the output stage to receive the output current, the integrator providing a voltage; and
a conductor for coupling the voltage to a drive electrode of a MEMS structure, wherein the output current increases or decreases the voltage provided by the integrator by an amount and in a direction controlled by the digital control word. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45)
-
-
46. A driver circuit for electrostatically driving a MEMS structure, comprising:
-
a programmable current means generating an output current for a programmable time; and
an integrating means coupled to receive the output current from the programmable current means, the integrating means providing a voltage which can be coupled to a drive electrode of a MEMS structure. - View Dependent Claims (47, 48, 49, 50, 51, 52, 53, 54, 55, 56)
-
-
57. A method for operating a driver circuit electrostatically driving a MEMS structure, comprising:
-
generating a first output current in response to a first digital control word; and
integrating the first output current to increase or decrease a first voltage by an amount and in a direction controlled by the first digital control word to obtain a second voltage which can be coupled to a drive electrode that electrostatically drives the MEMS structure. - View Dependent Claims (58, 59, 60, 61, 62, 63, 64)
-
-
65. A method for operating a driver circuit that electrostatically drives a MEMS structure, comprising:
-
receiving a first digital control word including information relating to a first integration duration, a first integration direction, and a first integration current level, the first digital control word representing a change to a first voltage across an integrate-and-hold capacitor;
in response to the first digital control word, generating a first reference current in the first integration direction, at the first integration current level, and for the first integration duration; and
in response to the first reference current, generating a first output current in the first integration direction, at a level scaled relative to the first integration current level, and for the first integration duration;
supplying the first output current to the integrate-and-hold capacitor, wherein a second voltage develops across the integrate-and-hold capacitor and can be coupled to a drive electrode that electrostatically drives the MEMS structure. - View Dependent Claims (66, 67, 68, 69, 70, 71, 72, 73, 74, 75)
-
Specification