Abstract: A signal conditioner for generation of excitation signals and for detecting an output signal from a capacitive transducer such as a strain gage, a pressure transducer or an accelerometer. The signal conditioner includes a digital waveform generator for generating a waveform that approximates a sine wave and for generating a binary signal synchronized to the waveform, a filter responsive to the waveform for providing a first sinusoidal excitation signal, an analog inverter responsive to the first excitation signal for providing a second sinusoidal excitation signal that is 180.degree. out of phase with the first excitation signal and a demodulator responsive to the binary signal for synchronously detecting an output signal from the capacitive transducer.