Integrated circuit including a surface acoustic wave transformer and a balanced mixer
US5265267A · kind A · utility
46Cited by
14References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 29, 1991 |
| Grant date | Nov 23, 1993 |
| Priority date | — |
| Expiry date | Aug 29, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03D2200/0007
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
In a radio transceiver (100), an IF stage (110) is formed on a single substrate. A balanced or image rejection mixer (204) having two pairs of inputs and a pair of outputs is integrated on an IC substrate (202). Disposed on the IC substrate are SAW transformers (210, 212 and 214) which provide a desired phase transformation. The SAW transformers comprise piezoelectric layers (228) and metallization layers (230) which are suitably patterned to provide the desired phase transformation and frequency selectivity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.