John W Mcbride

US Patent:

59995505, Dec 7, 1999

Filed:

Jan 8, 1999

Appl. No.:

9/227592

Inventors:

Arthur J. Bellemore - Salem NH
John M. McBride - Peabody MA

Assignee:

Agfa Corporation - Wilmington MA

International Classification:

H01S 300

US Classification:

372 38

Abstract:

A laser diode driver system automatically tracks the difference between the steady state operating point of a feedback signal in response to a laser diode driver circuit operation and the steady state operating point of the same feedback signal in response to a dummy driver circuit operation. That difference is used to compensate the dummy driver circuit operation such that its operating point correlates with the laser diode driver circuit operation. Further, in accordance with a second aspect of the present invention, a laser diode driver system automatically tracks the difference between the steady state operating point of a feedback signal in response to the quiescent laser diode driver circuit operation and the steady state operating point of the same feedback signal in response to the output of a high frequency oscillator. That difference is used to adjust a variable current source such that a dummy driver circuit is not disabled until the laser diode turn-on time delay has expired. The disablement is extended when the current drawn by the current source changes the discharge time of a capacitor that is connected to the enable signal for the dummy driver circuit.

US Patent:

20170044577, Feb 16, 2017

Filed:

Apr 20, 2015

Appl. No.:

15/305819

Inventors:

- Wellesley Hills MA, US
Justin VAN ROOYEN - Wellesley Hills MA, US
John MCBRIDE - Wellesley Hills MA, US
Alan BELCHER - Wellesley Hills MA, US

International Classification:

C12P 7/10

Abstract:

Integrated cellulosic ethanol and corn ethanol production processes reduce the capital and operating costs of cellulosic ethanol production through high levels of integration with pre-existing corn ethanol processing equipment. The processes comprise separating corn starch from other, non-fermentable corn components (e.g. germ, protein, fiber, etc.) and cofermenting sugars derived from the corn starch in the presence of a pretreated cellulose feed. The cofermentation can be carried out using one or more hemicellulose sugar utilizing yeast strains, for example, such as one or more yeast strains.