H - Electricity – 04 – B
Patent
H - Electricity
04
B
H04B 1/04 (2006.01) H03G 3/20 (2006.01) H04B 1/40 (2006.01) H04B 7/005 (2006.01) H04B 7/26 (2006.01) H04J 3/02 (2006.01) H04B 1/56 (2006.01)
Patent
CA 2072582
A TDMA cellular telephone (600) includes, in its transmit signal path, microphone (608), vocoder (612), data format circui- try (601), quadrature modulator (602), 90 MHz local oscillator (606), transmitter with mixer (604), transmitter filter (618), and an- tenna (620). In its receive signal path, the TDMA cellular telephone (600) includes receiver filter (622) coupled to antenna (620), quadrature demodulator (624), and data deformat circuitry (625). The channel frequency of TDMA cellular telephone (600) is loaded into synthesizer (616) by microcomputer (614) and applied to transmitter (604) and demodulator (624). TDMA cellular telephone (600) is controlled by microcomputer (614) which includes a memory with a control and signaling computer program stored therein. Transmitter (604) includes novel power control circuitry (100) comprised of variable gain stage (104), mixer (106), bandpass filter (109), and directional coupler (112) in a forward path, and detector (116), A/D converter (118), digital controller (120), and D/A converter (126) in a feedback path.
Cahill Stephen V.
Walczak Thomas J.
Gowling Lafleur Henderson Llp
Motorola Mobility Inc.
LandOfFree
Power control circuitry for a tdma radio frequency transmitter does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Power control circuitry for a tdma radio frequency transmitter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Power control circuitry for a tdma radio frequency transmitter will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1487116