Title:
LOW POWER TRANSMITTER OSCILLATOR CIRCUITS AND METHODS
Document Type and Number:
WIPO Patent Application WO/2019/140424
Kind Code:
A1
Abstract:
A fast startup power oscillator transmitter includes a transistor pair that drives a resonant circuit including a tunable capacitance. A capacitor array preferably forms the tunable capacitance. A voltage booster activates the capacitor array. A clamped body bias voltage booster can set the body bias voltage of the transistor pair in one circuit. Control circuitry activates the resonant circuit through a triode-mode switch transistor in response to an input in a range of 0.3 - 0.6V, and preferably while controlling the substrate bias voltage of the transistor pair to increase transconductance of the cross-coupled transistor pair. In a variation, a circuit pushes a top plate voltage of one of the two capacitors to 2VDD and pulls the top plate voltage of the other to zero to give the oscillator an initial condition. In a variation, a shaped pulse drives the transistor pair to switch to a class D oscillator mode, and the triode mode switch transistor is only turned on when the oscillation signal voltage is in the range of 0.3 - 0.6V.
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Inventors:
WANG XIAOYANG (US)
MERCIER PATRICK (US)
MERCIER PATRICK (US)
Application Number:
PCT/US2019/013591
Publication Date:
July 18, 2019
Filing Date:
January 15, 2019
Export Citation:
Assignee:
UNIV CALIFORNIA (US)
International Classes:
H03K3/03; H03K3/14
Foreign References:
| US20020135433A1 | 2002-09-26 | |||
| US6057742A | 2000-05-02 | |||
| US6937487B1 | 2005-08-30 | |||
| US8330549B1 | 2012-12-11 | |||
| US7034628B1 | 2006-04-25 | |||
| US7009458B2 | 2006-03-07 |
Attorney, Agent or Firm:
FALLON, Steven P. (US)
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