Abstract: A dual mode wireless device in which a coefficient generator (42) generates parameter values for a GSM waveform, based on transmitted sequences of digital data values from a GSM unit (34), using a multiplierless operation, and a waveform generator 44 generating the GSM waveform using the generated parameter values. The coefficient generator includes adder sections (132, 134, 136), each having corresponding adders (142, 144, 146) and multipliers (148, 150, 152), register sections (154, 156, 158), each containing parameters corresponding to a modulator (48), and transmit data registers (TXDATA[5]-TXDATA[0]) sequentially receiving the digital data values from the GSM unit.

Abstract: A waveform generator for generating a waveform in a dual mode wireless device includes a first waveform generator portion (106) and a second waveform generator portion (108). The first waveform generator portion includes a first register (86) connected in series with a second register (84) and a first feedback selector (88), and the second waveform generator portion includes a third register (102) connected in series with a fourth register (100) and a second feedback selector (104).

Abstract: A communication control apparatus (108) for use in an electronic device (102) includes a device (111), first and second communication lines (116 and 117), and a controller (110). The device (111) and the controller (110) are interconnected by the first and second communication lines (116 and 117), which are driven by the controller (110). The first and second communication lines (116 and 117) have different capacities and the first communication line (116) is subject to disabling. The controller (110) programs the device (111) using the first communication line (116) prior to its disabling and programs the device (111) via the second communication line (117) while the first communication line (116) is disabled. The apparatus (108) permits periodic placement of portions of the electronic device (102), including a master clock (112), into a powered-off state from which return to a powered-on state is possible.

Abstract: A system (100 or 200) includes a first AGC stage (102) having a programming input and a gain input. A second AGC stage (104 or 210 and 234) is coupled in a common path with the first AGC stage, the second AGC stage having a programming input and a gain input. The first and second AGC stages are programmed by respective programming signals to produce independent gain characteristics responsive to a common gain signal at their respective gain inputs.

Abstract: A communication device (104) comprises a receiver circuit (108) receiving a modulated receive signal. A reference oscillator (132) generates a first clock signal at a first frequency, the first clock signal having harmonics. Circuitry (130) coupled to the reference oscillator and to the receiver responds to the first clock signal to produce a signal used by the receiver to reduce the frequency of the modulating signal. A frequency spreading circuit (134) is also coupled to the reference oscillator to modulate the first clock signal with a frequency spreading signal to produce a modulated clock signal including modulated harmonic frequency components. The frequency spreading circuit selectively combines the frequency spreading signal and the first clock signal. A control circuit (114) controls the frequency spreading circuit to modulate first clock signal with the frequency spreading signal when the selected received signal includes a harmonic of the first clock signal.