Transimpedance amplifier and method for constructing same
US5714909A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 14, 1996 |
| Grant date | Feb 3, 1998 |
| Priority date | — |
| Expiry date | Jun 14, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F3/082
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A transimpedance amplifier (10, 50) is provided for processing a current signal received from a circuit device (12, 52). The circuit device (12, 52) can be a photodiode used to receive infrared transmissions. The transimpedance amplifier (10, 50) includes a first stage (14, 54) coupled to an input node. The first stage (14, 54) has a first amplifier (20, 60) operable to drive the input node and is operable to provide a current signal to a second node (NODE 3, NODE 2) in response to a current signal in the input node. A second stage (16, 56) is connected to the second node (NODE 3, NODE 2). The second stage (16, 56) has a second amplifier (32, 68) and is operable to convert the current signal in the second node (NODE 3, NODE 2) into an output voltage signal (V.sub.OUT) at an output node. A feedback loop (18, 58) can be connected to receive the output voltage signal (V.sub.OUT) and to provide a feedback current signal to cancel ambient noise in the current signal in the input node.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.