Digital-to-analog converter

1. A digital-to-analog converter comprising at least one cell, the at least one cell having:

a first coupling capacitor with a second terminal connected to an output;

a first inverter connected between a bias voltage and ground, wherein gates of the first inverter are connected to a data input and a first common point is connected to a first terminal of the first coupling capacitor;

a second inverter connected between the bias voltage and ground, wherein the gates of the second inverter are connected to an inverted data input and a second common point is connected to a first terminal of a second coupling capacitor;

a differential output connected to a second side of the first coupling capacitor and a second side of the second coupling capacitor, wherein the differential output of at least one of the cells comprises

a third capacitor connected between the second side of the first coupling capacitor and ground;

a fourth capacitor connected between the second side of the second coupling capacitor and RF ground; and

an inductor connected between the second side of the first coupling capacitor and the second side of the second coupling capacitor and having a RF ground tap.

2. The digital-to-analog converter of claim 1 , wherein

the bias voltage is a supply voltage.

3. The digital-to-analog converter of claim 1 , wherein

the first inverter is a push-pull switch-mode power amplifier.

4. The digital-to-analog converter of claim 3 , wherein

the push-pull switch-mode power amplifier is realized using at least one of discrete or integrated MOS, JFET, MESFET or HEMT transistors.

5. The digital-to-analog converter of claim 1 , where the inductor comprises

a first inductor connected between the second side of the first coupling capacitor and ground; and

a second inductor connected between the second side of the second coupling capacitor and ground; wherein

one terminal of the first inductor, one terminal of the second inductor and ground are commonly connected.

6. The digital-to-analog converter of claim 1 having a plurality of cells with the outputs being commonly connected.

7. The digital-to-analog converter of claim 2 having a plurality of cells with the differential outputs being commonly connected.

8. A delta sigma modulator comprising:

an input connected to at least one first transconductance element having an output connected to a node;

at least one resonator connected to the node;

at least one digital-to-analog converter with an output being connected to the node;

at least one second transconductance element with an input connected to the node and an output connected to an analog-to-digital converter; and

a feedback loop connected between the output of the analog-to-digital converter and the input of the at least one digital-to-analog converter, wherein the digital to analog converter comprises at least one cell, the at least one cell having:

a first coupling capacitor with a second terminal connected to the output;

a first inverter connected between a bias voltage and ground, and wherein gates of the first inverter are connected to a data input and a first common point is connected to a first terminal of the first coupling capacitor;

a second inverter connected between the bias voltage and ground, wherein the gates of the second inverter are connected to an inverted data input and a second common point is connected to a first terminal of a second coupling capacitor;

a differential output connected to a second side of the first coupling capacitor and a second side of the second coupling capacitor, wherein the differential output of at least one of the cells comprises

a third capacitor connected between the second side of the first coupling capacitor and ground;

a fourth capacitor connected between the second side of the second coupling capacitor and RF ground; and

an inductor connected between the second side of the first coupling capacitor and the second side of the second coupling capacitor and having a RF ground tap.