Voltage-to-current converter

• US 7,012,466 B2
• Filed: 02/05/2004
• Issued: 03/14/2006
• Est. Priority Date: 02/05/2003
• Status: Expired due to Fees

• Current Assignee: Avago Technologies Fiber IP Singapore PTE Limited (Broadcom, Inc.)
• Original Assignee: Avago Technologies General IP PTE Limited (Broadcom, Inc.)
• Inventors: Cerisola, Mauro
• Primary Examiner(s): JeanPierre, Peguy
• Assistant Examiner(s): NGUYEN, KHAI M
• Application Number:
  US10/771,546
• Publication Number:
  US 20040160277A1
• Time in Patent Office: 768 Days
• Field of Search: 330/69, 330/85, 330102-105, 330/260, 372/38.02
• US Class Current: 330/260
• CPC Class Codes: G05F 1/561 Voltage to current converters amplifiers H03F

Abstract

A load responds to a voltage-to-current converter including a differential amplifier. A sensing resistor is series connected with the load and first and second feedback resistors, respectively included in first and second voltage dividers having taps connected to non-inverting and inverting inputs of the amplifier. One divider is connected between a first terminal of the sensor resistor and one voltage responsive input terminal of the converter. Another divider is connected between the second terminal of the sensor resistor and a second converter input terminal, that can be grounded or voltage responsive. The feedback resistors have the same value that is much greater than the sensor resistor value. The first divider can be connected to the first or second terminal of the sensor resistor and vice versa for the second divider.

Claims