Transimpedance circuits and methods
AssigneeAnalog Devices International Unlimited Company
InventorsJinhua NI, Wei WANG, Hui SHEN
Life of this patent
Estimating the term…
Abstract
Disclosed herein are transimpedance circuits, as well as related methods and devices. In some embodiments, a transimpedance circuit may include a current source bias terminal, a current source output terminal, and a transimpedance amplifier coupled to the current source output terminal, wherein voltage signals at the current source bias terminal are correlated with voltage signals at the current source output terminal. In some embodiments, the current source may be a photodiode.
Claims20
A transimpedance circuit, comprising:
- a current source bias terminal;
- a current source output terminal;
- a transimpedance amplifier coupled to the current source output terminal;
- wherein voltage signals at the current source bias terminal are correlated with voltage signals at the current source output terminal.
A photometric system, comprising:
- photodiode receiver circuitry, wherein the photodiode receiver circuitry includes a first photodiode terminal, a second photodiode terminal, and a transimpedance amplifier to generate a differential voltage from a current between the first photodiode terminal and the second photodiode terminal, and wherein voltages at the first photodiode terminal and the second photodiode terminal are correlated.
A method of operating a photodiode circuit, comprising:
- providing a bias voltage to a photodiode terminal;
- and
- providing a common-mode voltage to a transimpedance amplifier, wherein the bias voltage and the common-mode voltage are correlated.
Dependencies are inferred from the claim text.