Temperature compensation attenuator

摘要

In one embodiment, a temperature compensating attenuator is disclosed having an attenuation circuit and a control circuit. The temperature compensating attenuator circuit may include a first series connected attenuation circuit segment and a shunt connected attenuation circuit segment, as well as additional attenuation circuit segments. Each attenuation circuit segment includes a stack of transistors that are coupled to provide the attenuation circuit segment with an impedance attenuation level having a continuous impedance range. The control circuit may be operably associated with the stack of transistors in each attenuation circuit segment to control the attenuation level of the attenuation circuit. The temperature compensating attenuator includes a temperature compensating circuit that compensates for variations in operation of the attenuation circuit due to a temperature change.

主权项

1. A temperature compensating attenuator, comprising:
a first attenuation circuit having a first attenuation level, the first attenuation circuit comprising:
a first series connected attenuation circuit segment having a first plurality of stacked transistors;a first shunt connected attenuation circuit segment having a second plurality of stacked transistors; a control circuit adapted to receive an attenuation control signal, the control circuit being coupled to the first plurality of stacked transistors and the second plurality of stacked transistors to control the first attenuation level of the first attenuation circuit based on a signal level of the attenuation control signal; and a temperature compensating circuit being operable to generate an attenuation control adjustment signal having a signal level related to a temperature change in an operating temperature associated with the first attenuation circuit, the temperature compensating circuit being operably associated with the control circuit so that the attenuation control signal is adjustable based on the signal level of the attenuation control adjustment signal.