DA converter which combines output of a plurality of low pass fi

Details DA converter which combines output of a plurality of low pass fi DA converter which combines output of a plurality of low pass fi

1992-11-24

1994-12-20

Young, Brian K.

Coded data generation or conversion

Analog to or from digital conversion

Digital to analog conversion

375 24, H03M 166

Patent

active

053749294

ABSTRACT:
In a DA converting circuit using a PAM circuit and low pass filters, an analogue signal of high quality can be obtained by removing ringing due to the cut-off frequency of the filters. A PAM signal outputted by the PAM circuit is switched on and off by a plurality of electronic switches arranged in parallel. Further outputs thereof are combined by an adding circuit through a plurality of LPFs to obtain a synthesized analogue signal. The inputs and the outputs of the LPFs described above are turned on and off by a plurality of electronic switches linked with each other. The different switches are driven by pulses produced from a clock signal, corresponding to a sampling frequency for the PAM circuit.

REFERENCES:
patent: 4616185 (1986-10-01), van Roermund
patent: 4739304 (1988-04-01), Takeda et al.

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