A monolithic 12-bit multiplying DAC for NTSC and HDTV applications

Martinez, Carolyn; Simpkins, S.; Taylor, S.S.

doi:10.1109/bipol.1989.69459

Cited by 1 publication

(3 citation statements)

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“…The bandwidth of the op amp is thus limited and so is the dynamic performance of the reference amplifier. Both references [4] and [7] emphasize the importance and difficulties of designing an op amp for wide bandwidth performance while maintaining adequate dc gain and low noise. The following section shows how the dynamic performance of the reference amplifier affects glitch energy and settling of the DAC.…”

Section: Previous Work On Reference Amplifiersmentioning

confidence: 99%

“…6, which shows a bandwidth of about 2.5 GHz. On the other hand, a specially designed op amp has a bandwidth of only 50 MHz [4,7].…”

Section: The New Reference Amplifiermentioning

confidence: 99%

“…The bandwidth is therefore limited to have good phase margin for closed loop stability. In [4], an op amp with DC gain of 80 dB and bandwidth of 50 MHz is used for the reference amplifier. This design requires an unusual compensation scheme and a PTAT current source to provide bias.…”

Section: Application In Multiplying Dac and Transversal Filtermentioning

confidence: 99%

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A Fast Settling HBT Reference Amplifier for High Speed Digital-to-Analog Converters

Dai

Comer

2005

Analog Integr Circ Sig Process

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This paper proposes a fast settling reference amplifier for use with a current-steering Digital-to-Analog Converter (DAC). The reference amplifier utilizes an open loop architecture, resulting in a bandwidth of 2.5 GHz, small chip area and low power. The wide bandwidth of the reference amplifier is shown to be important for fast settling of DAC current output. The reference amplifier is also able to generate a reference current that tracks fast changes of reference voltage, thus is useful in applications such as multiplying DACs and transversal filters. The proposed design was fabricated using a 1 µm GaAs HBT process. The prototype reference amplifier achieves a temperature coefficient of 92 ppm/ • C over a temperature range of 0-100 • C and the reference current changes only ±2.14% when the power supply varies ±0.2 V.

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Section: Previous Work On Reference Amplifiersmentioning

confidence: 99%

“…6, which shows a bandwidth of about 2.5 GHz. On the other hand, a specially designed op amp has a bandwidth of only 50 MHz [4,7].…”

Section: The New Reference Amplifiermentioning

confidence: 99%