Switchable high pass configuration and an optical receiver with a switchable high pass configuration

A switchable high-pass filter arrangement configured to determine the high-pass filter behavior of the arrangement by a lower limiting frequency, comprising:

• a transistor circuit, comprising at least one transistor in a common-gate or common-base connection;
• a capacitive component in series with an input of the transistor circuit;
• and
• a programmable device configured to set an operating current of the transistor circuit. the programmable device comprising a programmable current mirror;
• wherein a limiting frequency of the high-pass filter arrangement is switchable by means of the programmable device.

A switchable high-pass filter arrangement configured to determine the high-pass filter behavior of the arrangement by a lower limiting frequency, comprising:

• a transistor circuit, comprising at least one transistor in a common-gate or common-base connection;
• a capacitive component in series with an input of the transistor circuit;
• and
• a programmable device configured to set an operating current of the transistor circuit, the programmable device comprising a constant-gm circuit configured to generate the operating current that is operable to compensate for temperature influences;
• wherein a limiting frequency of the high-pass filter arrangement is switchable by means of the programmable device.

A high-pass filter arrangement, comprising:

• a transistor circuit, comprising at least one transistor in a common-gate or common-base connection, wherein the transistor comprises a control terminal forming an input of the high-pass filter arrangement, and an output terminal forming an output of the high-pass filter arrangement;
• a capacitive component coupled to the input of the high-pass filter arrangement, wherein the transistor circuit and the capacitive component cooperatively operate to substantially attenuate a signal below a limiting frequency thereof, and provide the attenuated signal at the output, wherein the limiting frequency is a function of transconductance of the transistor circuit and a capacitance of the capacitive component;
• and
• a bias circuit comprising a current source coupled to the transistor circuit, and configured to selectively vary an operating current associated with the transistor circuit by adjusting the current source, thereby altering the transconductance thereof and the limiting frequency of the high-pass filter arrangement.