Integrated circuit adjustable RF mixer
US6590438B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 8, 2002 |
| Grant date | Jul 8, 2003 |
| Priority date | — |
| Expiry date | Mar 8, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03D2200/0084
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
The invention describes improvements to a balanced active demodulator subsystem implemented in Radio Frequency integrated circuit technology that simplify the configuration and set-up of a balanced demodulator section and reduce the labor and time required during manufacture to adjust the demodulation characteristics for optimum performance. The subsystem allows for the selection of various combinations of components during use, during configuration and set-up, or during both phases, and comprises a mixer, a plurality of parallel RF balanced amplifier input stages operationally connected to the mixer, a first set of switches arranged to permit the independent selection and making operable one of the RF balanced amplifier stages, a number of pairs of current sources arranged to provide bias currents for the RF balanced amplifier input stages to reduce the current required to be passed through the balanced demodulator section; and a second set of switches arranged to permit the independent selection and making operable one of said pairs of current sources. The invention provides a balanced demodulator subsystem suitable for use in products in which cost-effectiveness is a critical fa…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.