Patent ID: 9209815
Filing Date: 2015-12-08
Classification: H03L,H04B

Abstract:
1. A charge pump circuit for an optical phase lock loop, the charge pump circuit comprising: first and second optical thyristors, wherein said first optical thyristor is configured to receive a first digital optical signal input, and wherein said second optical thyristor is configured to receive a second digital optical signal input; a first filter circuit operably coupled to said first optical thyristor; first control circuitry operably coupled to terminals of said first optical thyristor and receiving a first digital electrical signal input corresponding to the second digital optical signal input; a second filter circuit operably coupled to said second optical thyristor; and second control circuitry operably coupled to terminals of said second optical thyristor and receiving a second digital electrical signal input corresponding to the first digital optical signal input; wherein said first control circuitry is configured to control switching operation of said first optical thyristor that sources current to the first filter circuit in response to the levels of the first digital optical signal input and the first digital electrical signal input; and wherein said second control circuitry is configured to control switching operation of said second optical thyristor that sinks current from the second filter circuit in response to the levels of the second digital optical signal input and the second digital electrical signal input.