Transmitter for operation with restricted power consumption

Abstract

A transmitter is disclosed for operation with restricted power consumption. The transmitter comprises a signal generation oscillator configured to provide a signal for transmission, a phase-locked loop (PLL) configured to calibrate an oscillator frequency of the signal generation oscillator in relation to a reference frequency by providing a first control signal to the signal generation oscillator, and holding circuitry configured to maintain a digital representation of the first control signal provided by the PLL for provision of a second control signal to the signal generation oscillator when the PLL is inactive. A circuit chip comprising the transmitter is also disclosed. The circuit chip may further comprise a wake-up receiver (WUR). A communication device comprising the transmitter and/or the circuit chip is also disclosed. The communication device may further comprise a default transceiver configured for operation with power consumption which is higher than the restricted power consumption of the transmitter. For example, the transmitter may be configured to be operative while the default transceiver is in sleep mode.

Dependencies are inferred from the claim text.