Patent ID: 6924759
Filing Date: 2005-08-02
Classification: H03M

Abstract:
1. A multi-channel integrated circuit comprising: a plurality of on-chip channels, a digital-to-analogue converter (DAC) located in each channel, each DAC having an analogue output, an on-chip digital input port for receiving digital data, an on-chip interface and control logic circuit for receiving digital data from the digital input port and for selectively applying the digital data to the DACs for conversion thereof to analogue output signals, an on-chip monitoring output terminal, and an on-chip switch network coupled to the on-chip monitoring output terminal and to the analogue outputs of at least some of the DACs, the switch network being operable under the control of the interface and control logic circuit for selectively switching the analogue output signals from the at least some of the DACs to the monitoring output terminal for facilitating external monitoring thereof.