Title:
MIXER-SYSTEM WITH GAIN-BLOCKS AND SWITCHES
Document Type and Number:
WIPO Patent Application WO2004098043
Kind Code:
A3
Abstract:
Mixer-systems comprising gain-blocks (1-4) and switches (5-8) have a flexibility depending upon their configuration (insight) and are made more flexible (basic idea) by supplying data input signals to the gain-blocks (1-4) and oscillation signals to the switches (5-6) for switching couplings between the gain-blocks (1-4). A switch (5-6) comprises a switch-transistor and a gain-block (1-4) either comprises a gain-block-transistor or comprises five gain-block-transistors for increasing the linearity of the mixer-system. The switches (5-6) have main electrodes which in the balanced situation are all coupled via four impedances (13-16) to the gain-blocks (1-4). In the single ended situation two main electrodes are coupled via two impedances (13, 15, 18, 20) to the gain-blocks (1-4) and two others are coupled directly to the gain-blocks (1-4). By introducing further switches (7-8) parallel to the switches (5-6), harmonics can be suppressed. The basic mixer-system has an improved performance which can be further improved easily.
Inventors:
NORDHOLT ERNST H (NL)
Application Number:
PCT/IB2004/050524
Publication Date:
January 06, 2005
Filing Date:
April 27, 2004
Export Citation:
Assignee:
KONINKL PHILIPS ELECTRONICS NV (NL)
NORDHOLT ERNST H (NL)
NORDHOLT ERNST H (NL)
International Classes:
H03D7/14; (IPC1-7): H03D7/14
Foreign References:
| EP0316999A1 | 1989-05-24 | |||
| EP1289125A2 | 2003-03-05 | |||
| EP1067673A2 | 2001-01-10 |
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