Phase-compensated impedance converter

Abstract

Integrated circuits, for example, gyrator circuits include transistors that are preferably MOS devices and that are provided with series feedback networks, which compensate for the effects of channel delay in the MOS devices.

Description

Background of the invention [0001] The present invention relates to electronic impedance converter circuits, in particular to inverters or gyrators, and more particularly to phase compensated gyrators and integrators. [0002] One of the advantages of electronic integrated circuits (ICs) is their small size, so ICs are commonly used in hand-held or other devices, but some circuits require some components that are difficult to integrate. In particular, it is difficult to integrate passive inductances larger than a few nanohenries (nH). Thus, for example, chip-scale passive signal filters are generally limited to resistor-capacitor (RC) filters, unless filters are designed for very high frequencies, where an inductance (coil) of a few nH is effective. [0003] In communications and electronics, a filter usually refers to hardware or software that selectively passes one component of a signal while removing or minimizing other components. For example, a filter in a telecommunica...

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Problems solved by technology

[0014] Additionally, applicants believe that no complex active high frequency continuous-time chip scale MOS filter has been fabricated due to the unreliability of the gyrator unit

The filters that have been manufactured are very simple, limited to low-order filters or cascaded low-order filters (with poor sensitivity characteristics) or more complex low-frequency filters

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